CA1080077A - Process for making variegated soap - Google Patents

Abstract

ABSTRACT
A process for making multicolored soap bars wherein a coloring agent is dispersed in a meltable solid or organic liquid vehicle and Introduced into a base soap material as a liquid colored material before the base soap material is extrud-ed in the form of a continuous log which is subsequently cut and pressed to form a multicolored soap bar. The meltable solid material solidifies upon contact with the base soap mater-ial to form variegated, striated or marbleized colored regions in the final bar.

Description

108~077 :
BACKG~OUND OF T~IE INVENTION
This invention relates to a process for making multi-colored soap bars and particularly to a process enabling the production of an improved variegated, striated or marbleized soap bar wherein the color striations are sharper and more distinct relative to soap bars produced by prior art processes.
~ yar~ous processes are known wherein milled soap of a base color such as white is introduced into a more or less conventional double barrel plodder along with a suitable color-~ng agent whereby the extruded column exhibits color striations,and the column is subdivided and pressed to form bars of varie~
gated soap. ~or example, see Compa et al Patent No. 3,~85,905 which teaches adding the coloring agent in the form of an aqueous dye solution to the vacuum chamber between the upper and lower plodder barrels. Other apparatus and processes for p~oducing marbleized or striated soap are disclosed, for example, in Matthaei U.S. patents Nos. 3,832,431; 3,769,225 and 3,673,,294:
Meyer et al U.S. Patent 3,663,671 and Patterson U.S. Patent 3,676,538 among others.

2~ The Matthaei U.S. Patent 3,673,294 describes a process for producing multicolored soap base including the addition of a secondary soap component having a color different from that of the base soap into the vacuum chamber of a double barrel vacuum plodder. The colored soap is added in the form of seg-ment~ of solid soap extruded from an auxiliary plodder. ;
The coloring agent employed is usually a color dye or pigment material that is not harmful to the skin and usually . ~ .
d~ssol~ed and~or dlspersed in water and suitable introduced ~-~

' ' " '' . . , -` 3L08~077 :
into the base soap being worked in the plodder. Preferably the coloring agent is a water soluble dye certified by the Food and Drug Administration for external cosmetic or drug use, i.e., FD~C or D~C or external D~C dyes. A water soluble coloring agent is preferable to a water insoluble dye or pigment material because the former avoids any problem of an insoluble color residue when the soap bar is being consumed and tend to be more suitable for use on the skin.
A disadvantage has been noted, however, in multi-colored soap bars incorporating water soluble coloring agent in that the stripes or streaks may not be distinct or show -sharp contrast with the base soap color at their edges, and this is particularly apparent at the surface of the bar.
Apparently, due to the moisture content of the base soap, the colors lean into adjoining areas which results in interface .
bleeding between the background and colored portions and a ~ ~
"washed out" appearance. This bleeding effect also occurs when ~ -water insoluble pigments are used as the coloring agent, although `
to a lesser degree. The bleeding effect becomes increasingly more apparent as the moisture content of the soap increases, -particularly over 12% moisture by weight.
The invention includes the advantageous discovery that when a coloring agent is dispersed in a meltable solid vehicle or ln an organic liquid vehicle as described herein and combined with the base soap material as a liquid colored material includ-ing the coloring agent and the vehicle the foregoing bleeding effect is minimized and the streaks or stripes in the result-ing bars are shaTper and more distinct, thereby creating greatly "~

31L~8~()77 -improved appearance. Moreover, when the coloring agent is dis-persed in a meltable solid vehicle according to the invention the total viscosity of the dispersion is increased so that less coloring agent is required to obtain the same effect and the color variegation is more distinct.
A primary advantage of the invention is to provide a colored material comprising a dye or pigment dispersed, suspend-ed, dissolved, or emulsified in a meltable solid vehicle or in an organic liquid vehicle that when combined with a base soap a material results in an attractive soap bar that exhibits a minimum of interface bleeding.
A further advantage of the invention is to permit the ``
use of high moisture content base soap material, i.e. 12% or more water by weight, while maintaining the color distinctive-ness required for a saleable product.
Still further, the use of the vehicles of the invention for the coloring agent provides the bar with an improved "feel" ~
and soothing and emollient effects to the skin. ~ ;
A still further advantage of the invention is the use ~ ~-2~ of less coloring agent to obtain a desired colored effect.
Still further, invention combines the advantages of a ~ ; `
solid colored material after combination with the base soap material while permitting the colored material to be combined with the base soap as a liquid by spraying, dripping or inject- - ~
ing the colored material onto the base soap material. -SUMMARY OF THE INVE~TION
~ :, The invention provides an improved method for making multicolored, striated variegated OT marbleized soap bars.

- T~e meth~d ~X the ~n~ent~on includes the steps of ~ 3 ~

- : . , ':, ' . ' ' - ` ' 1C~84~077 supplying to a soap plodding apparatus a liquid colored material including a vehicle selected from the group consistingofameltable solid vehicle in a melted state selected from wax or wax-like materials having a melting point above about 100P and a liquid oil vehicle selected from oils of animal, vegetable and mineral origin, and a coloring agent selected from the group of water soluble dyes and water dispersible pigments, supplying a base soap material to said soap plodding apparatus, combining said colored material with said base soap material in said soap plodding apparatus to form a multicolored soap mass, ~xtruding said multicolored soap mass to form a multicolored billet, subdividing said billet into bars, and pressing said bars to a desired shape. The term soap as used herein includes saponified fatty acids as well as synthetic detergents and combin-ations thereof.
Another aspect Oe the present invention provides a multicolored soap bar comprising a base material having a base color and a plurality of veined areas of colored material having a color different from said base color dispersed through said base soap material and visible on the surface thereof, said veined areas of colored material providing a marbled, striated or variegated appearance to said bar and comprising a vehicle selected from the group consisting of a meltable solid vehicle selected from wax and wax-like materials having a melting point above 100F and a liquid oil vehicle selected from oils of animal, vegetable and mineral origin and a coloring agent selected from the group consisting of water-soluble dyes and water dispersible pigments.
The coloring agent can be any dye or pigment suitable for use in a soap bar and not harmful to human skin. Water soluble FD~C D~C
or ext. D~C dyes are particularly suitable and include ultramarine blues and pinks, cosmetic green oxides and keratin as naturally occuring in palm oil, Further suitable colored materials are those r~ferred to in the U.S.
as FD~C tfoodJ drug and cosmetics) and D~C (drugs and cosmetics3 approved ~'~ ' ' .

108~077 dyes. Typical of coloring agents of this type are the following D~C dyes:
COLOR COLOR INDEX #
D~C Green #5 61570 D~C Green #6 61565 D~C Green #8 59040 D~C Yellow #10 47005 DgC Red #6 15850 D~C Red #7 15850 :
D~C Red #8 15585 -. .
D~C Red #9 15585 .
D~C Red #10 15630 D~C Red #11 15630 ;
D~C Red #12 15630 ; .
D~lC Red ltl3 15630 D~C Red #19 45170 D~C Red #21 45380A :
.
D~C Red #22 45380 ;~ :
D~C P~ed #27 45410 . ~
b~c Red #28 45410 .
.. ...
D~C Red #30 73360 : :~
D~C Red #33 17200 D~C Red #34 15880 D~C Red #36 12085 D~C Red #37 45170B
D~C Orange #5 45370A ~:.
D~C Orange #10 45425A
D~C Orange #11 4542Na D~C Orange #17 12075 P~C Blue #l 42090 3Q D~C Blue:~4 4209Q
D~C Blue #6 73000 D~C Blue #9 69825 .

'~ ~':..

~080(:~ 77 Examples of pigments employable in the method of the invention in-clude alumlnium, barium and other metallic lakes of dyes such as those de-scribed hereinabove. Other suitable pigments are monestral green GWP, monestral blue, Calcocid* yellow, chrome oxides, Ochres and titanium dioxide (white). The color of the coloring agent is chosen to contrast with the color of the base soap material and can be white when the base soap material is a color other than white.
The vehicle for the coloring agent, according to the invention, can be any meltable solid material that is not harmful to the human skin and will not react chemically with the coloring agent. The vehicle material should be liquid at a temperature above the 100~ and a solid below about 80F. Above lts melting point the vehicle should have a viscosity permitting it to be sprayed, dripped or injected and a specific gravity in the range of 0.5 to 1,0 in order to be suitably combined with the base soap material.
Suitable solid ~below about 80~) vehicles according to the in-vention are wax and wax llke materials of either natural or synthetic origin having a melting point (ASTM) above about 100F, preferably from about 100F
to about 200F, a specific gravity from about 0.5 to 1.0 typically about 0.8 to 0.95, a molecular weight ~average for mixtures) from about 200 to about 5000 and a hardness measured as tenths of a millimeter needle penetration (100 grams~5 sec.~25C ASTMD-1321) from about 1 to about 100, preferably about 10 to a4Out 50.
~ atural wax materials include mineral waxes such as paraffin and m~crocrystalline waxes derived from petroleum, and Montan, Lignite and Oz~cer~te waxes, derlved from coal; vegetable waxes such as bayberry wax, candeilla wax, carnauba wax, esparto wax, fir wax, ouricury wax, palm waxes, and cocoa butter; animal waxes such as beeswax, chinese (insect) wax and spermacetti wax.
Synthet~c wax like materials include fatty alcohols and acids such as cety~1 alcohol, Lanette wax, stearyl alcohol, Polawax, stearic acld, palmit~c acid and myristic acid; fatty acid esters and glycerides such as glyceryl stearates (mono, di and tri), hydrogenated oils such as coconut, *Trade mark ~.o~077 whale and cottonseed oils that have been completely hydrogenated and Carbowaxes. Carbowax is the ~rademark for certain solid polyethylene glycols that have a waxy appearance and feeling, and a melting point from about 100-130 F.
The organic liquid vehicle for the coloring agent in accordance wlth one aspect of the invention can be any suitable oil, either of vegetable, animal or mineral origin that is not harmful to the human skin and will not react chemically with the coloring agent. The oil vehicle should have a viscosity in the range of about 50 cps to about 150 cps and a specific gravity in the range of 0.5 to 1.0 at temperatures from about 60F to 100F
in order to be suitably combined with the base soap material by dripping, spraying or injection, Suitable oil vehicles according to the invention include vegetable olls such as almond oill babassu oil, coconut oil, corn oil, cottonseed oilJ
olive oil, palm-kernel oil, palm oil, peanut oil, tall oil and soybean oil.
Palm-kernel oll and p,alm oil are particularly preferred vegetable oils since they contain the natural coloring agent keratin and may be used without the addition of a separate coloring agent. Keratin is a natural dye having a golden yellow color that is present to different degrees in palm oil and palm kernel oil, According to a specific aspect of the invention, essential oils whlch are distilled oils of vegetable origin having a pleasant fragrance, can be used as the vehicle for the coloring agent. Typically, essential oils and mlxtures of essential oils, commonly known as perfumes, are added to the amalgamator upstream of the soap plodder during the manufacture of soap bars.
A significant portion of the perfume oil added to the amalgamator is lost by evaporation due to exposure to the atmosphere during processing. By using perfume or essential oils as the coloring agent vehicle, the oil serves the dual function of odoriferous agent and carrier for the coloring agent and loss by evaporation is minimized since the perfume can be added in the en-closed plodder rather than upstream of the plodder. Representative essential oil are lavender, lemon oil, sandalwood oil, rose oil and peppermint oil ~ 7 ~

.
':
. . .
........ . .

~C~8~77 ~

among many others. ~:
Representative of anlmal oils employable as a vehicle for the coloring agent are fish oils, fish-liver oils, greases, neat's-foot oil, whalejoil and oils from other animals.
T~e colortng agent is dissolved, dispersed, suspended or emulsified in the oil vehicle by any suitable means known in the art such as batch mixing. When oils that naturally include coloring agent are used, the specific addition of a coloring agent is not required although may be de-sired to obtain a particular coloring effect. The foregoing coloring agents and oil vehicles can be used either singly or in any suitable combination as desired for particular coloring effects. The coloring agent typically com-prises from at least about l to 50 percent by weight, preferably from about lO to about 20 percent of the colored material depending on the colored effect desired.
In preparing the colored material o the lnvention, the vehlcle i~
sol~d is ~lrst melted, and a suitable or desired amount of coloring agent is dispersed or suspended therein to form a unlorml~ colored liquid. The col~red liqu~d is maintained and sprayed, dripped or injected onto or into the base soap material. The base soap material ls at a temperature below the sQl~d~ftcation p~int of the colored vehicle when a solid vehicle is used and s~ltdiPtes when it contacts the base soap. The combined colored material and base 50ap are then plodded together in a soap plodder, extruded as a multi-colored btllet, cut to bar size and pressed to inal shape. The colored mater~al typ~cally comprises from at least about 1 to about 50 percent by we~g~t, preferablyi from about 10 to about 20 percent, of the coloring agent depending on the colored effect desired.
The weight ratio of colored material to base soap material is 1:50 to 1:1000 pre~erably li100 to 1:200, i.e., about 1 to 2 percent by weight de-pendtng ~n the coiors used and the multicolored effect desired.
esc~ ~t~Q~S o~ Speci~c Exam~es The invention can be urther lllustrated by the followlng examples.

All percentages given in the examples and elsewhere in the specification and r ~ ~ . .

i ~
claims are by weight unless stated otherwlse.
Example 1 ;~ , COLORED MATERIAL BASE SOAP MATERIAL '~
90% Paraffln Wax* 49% olefin sulfonate detergent 10% Monestrel Green GWD 50% 17:83 coco:tallow sodium soap chips 1% perfume '~
*Paraffin wax having the following properties: ,,' Melting Point (ASTM~ 122-124F ''~ ' Color ~Saybolt) 25-30 Flash Point 395~
Penetration at 32~ 16 , ' Penetration at 77P 22 ,, ' 115~ 221 ,;,, ;, Saponi~lcation Value O ,"
Viscosity at 212F 39 Sec. S.U.V. .
Structure Crystalline Speclfic Gravity 0.880-0.915 The colored material is prepared by melting the paraffin wax in a vessel having heat~ng means such as a heating coil or steam jacket and pro-v~s~n for m~x~ng. The dye component is added to the liquid wax and dis-persed there~n by the mixer.
The base soap material is plodded through the upper barrel of a dou~le barrel vacuum plodder and extruded in the form of segments, pellets or ' ' ,' strands into the vacuum chamber between the plodder barrels. The colored ~ater~al ~s w~thdrawn from the mixing apparatus, maintained in a molten state and ~ntroduced lnto the ~acuum chamber according to the method and apparatus , ', '', descr~bed in the Compa U,S. Patent 3,609~828. A sufficient amount of the colored material to provide about 0.58% of colored material in the final "
mult~colored soap product is supplied to the vacuum chamber. , '~
T,he ~ase soap material is at a temperature from about 65~F to 80~ ~ ' and ~n accordance w~th a specific aspect o the invention the liquid colored , ,' ' mater~al s~lid~fles upon contact with the base saap mater:lal. The colored ' ' _ 9 ~
"":';", ~8~3077 material and base soap are plodded together in the bottom plodder barrel and extruded through a die to form a continuous billet of soap. The billet is cut into bars of desired thickness and pressed to shape. The resulting bars have a white base with yellow variegations or stripes depending on the plodder and extrusion techniques used. After storage, and in use, the bars retain a distinctive multicolored appearance with little evidence of inter-face bleedlng.
Example 2 COLORED MATERIAL BASE SOAP MATERIAL
85% Candelilla Wax* 99%J 17:83 Coco:tallow ~ -sodium soap chips 15% D~C Yellowl#lO 1% Perfume *Candelilla wax having the following properties:
Melting Point 1~9-156P
SpeciEic Gravlty, 15C 0.982-0.993 Acid Number 11-19 Saponification Number 46-66 Iodine Number 15-36 M~sture Small percentage Unsaponiflable Matter 65-6~%
CalQr Tan Re~ractiYe Index 1.4555 Odor aromatic D~electr~c Canstant 2.50~2.63 Ef~ective C~nductivity 19 - ~ .
Volume Resistivity 120 ~ -..
The method of Example 1 is used to prepare the colored material and to comblne the colored material and base soap material to result in about 2.0% colored material in the final product. The final bars have a whitish 3a base color with distinctive brown tinted green ~ariegations. ~irtually no , evidence of interface bleeding is found after prolonged stQrage.

10.~ "',:
.~ .

i~81~

Example 3 : .
COLORED MATERIAL BASE SOAP MATERIAL ~ ~
.. : . .
90% Cetyl Alcohol* 98% Coco Monoglyceride Detergent 10% D~C Green #8 1% Per-fume ..
1% Anti~bacterial agent *Cetyl alcohol having the following properties:
Melting Point 115-125F
Specific Gravity, 15C 0~810 Boillng Point 334C
.. . ..... .. ..
10 Iodine Number <3 Acid Number O
Saponi$ication Number O
Unsaponifiable Matter 98-100%
Ash Re~ractive Index, 60C 1.4345 Color white Form crystalline .
Heat o~ Fusion (cal~mol) 8900 The method o~ Example 1 is used to produce a multicolored detergent bar o~ th~s $ormulation with 1,5% coloring material.
The bars exhi~it distinct green regions against a light background and the absence of significant interface bleeding.
Exam~le 4 :
COLQRED MATERIAL BASE SOAP MATERIAL
sa% Carbowax 1540* 99%, 17:83 Coco: tallow . : ~ .
sodium soap chips ~
10% ultramarine blue 1% per~ume *Car~oWax having the ~ollowing properties~
Ph~sical Appearance M~dium~hard, waxy solid .
Densit~ g per cc at 20C 1.15 Melting ~ange 104-115~F

y~scosity Range, Saybolt Universal at 210F 100-150 sec :
- 1 1 - ., ' ' .. . . . . . . . . . . ..
: . . . , . . .. . . ., . ~ , :

~ 8~7~

Flash Point, Open Cup 460F
The method of Example 1 is used to produce a multicolored soap bar of this formulation having a colored material content of about 1% in the final soap bars.
The soap bars have a whiteish background with distinct blue stria-tions and exhibit a virtual absence of interface bleeding.
Example 5 COLORED MATERIAL BASE SOAP MATERIAL

100% Cocoa Butter* 98% 17:83 Coco:tallow sodium soap chips `
1% perfume 1% antibacterial agent *Cocoa Butter having the following properties:
Melting Point 90-95F
Specific Gravityl 100-25C 0.858-0.864 Saponlfication Number 188-195 Iodine Number 35-40 Refractive Index, 40C 1.4537-1,4578 ReichterrMeissl Number 0.1 Polenske Number 0.2 ~ the bars produced b~ Examples 1-5 have distinct variegated areas of a di~fferent, preferably contrasting color with the base soap material, The method X Bxample 1 is used to produce a multicolored soap bar a~ th~s ~ormulation having a colored material content of 3% in the final soap ba~s.
The cocoa butter component has a natural yellowish color that pro-~ides the final soap bars with yellow striations against a light background.
Ot~er vehicle materials according to the invention are naturally colored i.e., include a coloring agent as they occur in nature, and do not require the addition o$ a separate coloring agent. For example candelilla was has a natural bro~n or tan color, and carnauba wax is obtainable in grades having a yellow color.
Example 6 .. . .
, r 12 ~

~ ~8~77 . .:
COLORED MATERIAL BASE SOAP MATERIAL
-: ,. . .
90% cottonseed oil 49% olefin sulfonate detergent 2% titanum dioxide 49%, 17:83 coco:tallow sodium soap chips 8% D~C yellow #10 1% perfume The base soap material is plodded through the upper barrel of a double barrel vacuum plodder and extruded in the form of segments, pellets or strands into the vacuum chamber between the plodder barrels. The colored material is introduced into the vacuum chamber according to the method and apparatus described ln the Compa U.S. Patent 3,609,828 at a temperature bet~een 65F and 75F. A suficient amount of the colored ma-terial to provlde about 0,58% of colored material in the inal multicolored soap product is supplied to the vacuum chamber. The colored material and base soap are plodded together in the bottom plodder barrel and extruded throug~ a die to form a continuous billet of soap. The billet is cut into bars of desired thickness and pressed to shape. The resulting bars have a wh~te base w~th yellow variegations or stripes depending on the plodder and extrusion techniques used. After storage, and in use, the bars retain a distinctive multicolored appearance with little evidence of interface bleeding.
Example 7 , COLORED MATERIAL BASE SOAP MATERIAL
:::
85% Essential oil of lemon 100% 17:83 Coco:tallow 15% ~onestrel Gre,en GWD* sodium soap chips The method of Example 6 is used to combine the colored material and base soap material tG rjesult in about 2.0% colored material in the final product. The final bars have a whitish base color with distinctive green variegations. Virtually no evidence of interface bleeding is found after ! pr~l~nged sto~age.
The lemon oil vehicle for the coloring agent also provides a pleasant fragrance to the final bar and eliminates the need for addition of a perfume to the base soap material, which is customary.

*Trade mark 13 .. .

~08~077 Example 8 COLORED MATERIAL BASE SOAP MATERIAL
90% Essential oil of Rose 100% Coco Monoglyceride 10% D~C Green #8 Detergent The method of Example 6 is used to produce a multicolored detergent bar of this formulation and with the pleasant fragrance of Rose and 1.5%
coloring material.
The bars e~hibit distinct green regions against a light background and the absence of significant interface bleeding. No perfume need be added to the base soap other than the coloring agent vehicle to produce an acceptable product fragrance. .: :
Example 9_ . ;
C~L~RED MATBRIAL BASE SOAP MATERIAL

80% extra light mlneral .:~ .
oil 99%, 17:83 Coco:tallow 10% ultramarlne blue sodium soap chips 1% perfume .
The ~ethod oE Example 6 is used to pToduce a multicolored ~blue-. . .
~wh~te~ 4a~ Su~fic~ent coloring material to result in a final bar having ~ .

1.0% cQloring material, is combined with the base soap material. . .
Exa_l~le ln : ~
COLORED MATERIAL BASE SOAP MATERIAL

100% palm o~l 100%, 17:83 Coco:tallow sodium soap chips T~e pal~ ~ll i9 naturally colored with keratin and is combined ~w.~t~ the baselsoap in a weight ratio of about 1:150. The method of claim 1 ls used to pr~duce a light base color bar having golden yellow striations or ~ar~egat~ons, All o~ the bars produced by Examples 6-10 have distinct variegated `.
, areas o~ a d~ferentl pr.eferably contrasting color with the base soap material.
Additionally, ~the base soap material can include a coloring agent t~ provide a colored bas~e, such as pink,.blue, yellow or green with con-trastlng white or colore~ variegated areas provided a~cord:ing to the inven~
-. ' ' _ . ' 14 - ~:

8~3[)7~

tion, by the addition of colored material to the base soap material.
In further accordance with the invention, any of the methods of the prior art for producing multicolored soap bars using a liquid colored materlal combined with a base soap material can be used with any of the formulations of Examples 1~5 instead of the preferred method as disclosed in the aforementioned Compa et al patent.

For example~ the colored materials of the invention can be sprayed on the soap chips before they are introduced into the upper barrel of a double barrel vacuum plodder, as shown and described in the Matthaei U.S.

10Patent 3,769,225. Similarly, the colored material can be injected into the -base soap mass at various points in the plodder as shown and described in the U.S, Patents 3,832,431; 3,676,538 and 3,663,671. However, excellent results have been obtained with the preferred method and apparatus described in the Compa et al U.S. Patent 3,485,905.
The multicolored soap bars produced b~ the Examples 1-10 include a base soap material having a base color, typically light colored, and a pluralit~ of veined areas of a color different from the base and preferably -~
contrasting with the base color. The veined areas are randomly dispersed throughout the soap and appear on its surface as distinct stripes or varie-gations depending on the operating parameters of the process and apparatus used. The veined areas include the colored material i.e., wax vehicle and coloring agent and are stable during prolonged storage, i.e., 6 months or greater, as evidenced by a very little, if any, interface bleeding.
The in~ention may be embodied in other specific forms without de- -parting from the SpiTit or essen*ial characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the append-ed claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, ~at is claimed and desired to be secured by Letters Patent is:

15 ~

Claims (18)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A method of producing multicolored soap bars comprising the steps of (a) supplying to a soap plodding apparatus a liquid colored material including

1. a vehicle selected from the group consisting of a meltable solid vehicle in a melted state selected from wax or wax-like materials having a melting point above about 100 F and a liquid oil vehicle selected from oils of animal, vegetable and mineral origin, and 2. a coloring agent selected from the group of water soluble dyes and water dispersible pigments, (b) supplying a base soap material to said soap plodding apparatus, (c) combining said colored material with said base soap material in said soap plodding apparatus to form a multicolored soap mass, (d) extruding said multicolored soap mass to form a multi-colored billet, (e) subdividing said billet into bars, and (f) pressing said bars to a desired shape.

2. The method of claim 1 wherein said soap plodding apparatus is a double barrel plodder which comprises upper and lower barrels separated by a vacuum chamber, said liquid colored material is supplied: to the vacuum chamber of said double barrel plodder, and said liquid colored material and said base soap material are combined in the-lower barrel of said double barrel plodder.

3. The method of claim 1 wherein said colored material containing a meltable solid vehicle solidifies when in contact with said base soap material.

4. The method of claim 2 wherein said colored material is dripped or sprayed into said vacuum chambers.

5. The method of claim 1 wherein said colored material comprises from about 1 to about 50 per cent by weight water soluble dye.

6. The method of claim 1 wherein the weight ratio of colored material to base soap material is from 1:50 to 1:1000.

7. The method of claim 1 wherein said liquid oil vehicle has a viscosity from about 50 CPS to about 150 CPS and a specific gravity from 0.5 to 1.0 at temperatures from 60°F to 100°F.

8. The method of claim 1 wherein said liquid oil vehicle is chosen from the group consisting of palm oil and palm kernel oil.

9. The method of claim 1 wherein said colored material containing a meltable solid vehicle is drippable or sprayable at temperatures above 100°F.

10. The method of claim 1 wherein said solid vehicle is chosen from the group consisting of natural waxes of mineral, animal and vegetable origin.

11. The method of claim 1 wherein said solid vehicle is a synthetic wax-like material.

12. A multicolored soap bar comprising a base material having a base-color and a plurality of veined areas of colored material having a color different from said base color dispersed through said base soap material and visible on the surface thereof, said veined areas of colored material providing a marbled, striated or variegated appearance to said bar and comprising a vehicle selected from the group consisting of a meltable solid vehicle selected from wax and wax-like materials having a melting point above 100°F and a liquid oil vehicle selected from oils of animal, vegetable and mineral origin and a coloring agent selected from the group consisting of water-soluble dyes and water dispersible pigments.

13. The multicolored soap bar of claim 12 wherein said coloring agent is a water soluble dye.

14. The multicolored soap bar of claim 12 wherein said solid vehicle is chosen from the group consisting of natural waxes of mineral, animal or vegetable origin.

15. The multicolored soap bar of claim 12 wherein said solid vehicle is a synthetic wax-like material.

16. The multicolored soap bar of claim 12 wherein said liquid oil vehicle is a natural or synthetic oil.

17. The multicolored soap bar of claim 12 wherein said liquid oil vehicle includes a fragrant essential oil.

18. The multicolored soap bar of claim 12 wherein said liquid oil vehicle is chosen from the group consisting of palm oil and palm kernel oil.