DE145375C - - Google Patents

Description

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IMPERIAL

PATENT OFFICE.

Are tissues, which with any

basic dye, exposed to an atmosphere saturated with (3-naphthol, so these vapors are produced by the turkish red oil prepared substance held.

In the case of subsequent development in diazo solution, the preprinted areas retain their Colors, while the bottom depends on the developing bath used or the one in question Color z. B. is colored red or garnet.

One can produce this saturated naphthol atmosphere either by using a steam stream or a stream of warm air through a small closed container, which the naphthol in pieces or in powder or in any solvent, such as Contains dissolved alcohol or acetin. From this container a pipe goes into the steam box, which is connected to its steam inlet pipe.

One can get to the same goal without a special device by using the rolls and steams preprinted pieces in goods prepared with naphthol solution.

The naphthol vapors condense on the goods, especially when they are oiled, and you only have to pass through the diazo solution as usual and soap.

If aniline black is present, this is first achieved by hanging or by briefly Steaming in a small device developed by Mather & Platt and subsequently the goods, such as above, exposed to naphthol vapors.

The above process has preceded the so-called Rolffs's process (see patent 1 13238 and addition 116694) the following advantages:

The colors are more thoroughly fixed by the longer steaming, as it is known in the Rolffsian process, the pieces can only expose to short steaming of 2 to 3 minutes, otherwise the naphthol primer evaporates and for the most part distilled away from the goods.

Second, it allows aniline black to be used both alone and in Combination with other colors, what the Rolffs'sche method, after which worked with strongly alkaline naphthol primer is not allowed.

Before the novel η's see procedure (Bulletin of the Industrial Society of Mulhouse, Minutes of the meeting of the Committee for Chemistry of December 8, 1897, p. 152) it has the advantage that you can dye through thick fabrics with ease, which otherwise only through cumbersome double patting is possible on both sides of the fabric.

It should also be mentioned that this new process does not result in a stronger concentration the color in tannin is necessary than is usual on white-bottomed patterns, what that Printing made much easier.

The method is e.g. B. carried out in the following way:

The goods intended for printing are oiled with a solution of 40 g of Turkish red oil 50 percent to 1 liter of water.

The following printing inks are used:

Printing color for blue:

28I starch-tragacanth thickening,

4 1 acetic acid,

540 g Nile blue R (BASF),
450 g methyl violet BL (Cassella),
225 g tartaric acid,
2300 g tannin,

2300 g acetic acid.

Printing color for green:

9I starch-tragacanth thickening,

3 1 acetic acid,

320 g Auramin II (BASF),
40 g navy blue BN (BASF),
1125g tannin.
25th

Ordinary blue wood black is used for black, and alizarin with chrome stain for puce. After printing, the fabric is wrapped in with ß-Naptholnatrium prepared idler sub towels and ¹ J ₂ damped to 1 hour. Avoid flowing steam. In order to prevent the inconvenience that the outer layers of the rolled-up piece turn out lighter after developing in paranitrodiazolebenzene, it is sufficient to roll the piece to be steamed into a somewhat longer follower.

The concentration of the sodium naphthol solution depends on the severity of the printed Were.

For goods of which 100 m weighs 10 kg, 20 g (3-naphthol, 20 g sodium hydroxide solution from 40 ^° C. to 1 liter of water) are sufficient.

For 18 to 20 kg per 100 m is used 40 to 50 g of beta-naphthol, 40 to 50 g sodium hydroxide 40 ^0, to 1 1 of water.

After steaming, it is drawn through diazo solution, washed, through as usual Tartar emetic taken and soaped.

The Turkish red oil preparation can possibly contain some soda or an alkaline tartar solution be admitted.

To what it can be attributed that from the followers prepared with sodium naphthol the free naphthol sublimes has not yet been elucidated; but the fact itself is certain established.

Perhaps under the influence of the steam a dissociation of the less stable sodium salt may occur of naphthol take place.

The first attempts were made by taking the followers after dissecting them with sodium naphthol passed through an acetic acid bath to neutralize the baking soda. The further experiments have shown, however, that this neutralization is superfluous. The acetic acid still remaining in the tannin colors is completely sufficient, to neutralize the baking soda when steaming.

It is known that when pieces prepared with sodium naphthol are printed on during fixation Tannin colors taken through the Mather & Platt steamer for too long most of the naphthol evaporates.

Claims (1)

Patent claim: Process for producing colorful effects on fabrics by fixing naphthol vapors on the same and subsequent development in diazo compounds.