SU682547A1 - Pencil for marking constructional materials - Google Patents

Description

(54) PENCIL FOR MARKING CONSTRUCTION MATERIALS

The invention relates to marking pen compositions, e.g. for marking building structures. Marking pencils based on paraffin (wax), dye and napolitel are known 1. Of the known marking pencils, the proposed composition for marking reinforced concrete and concrete products is closest to 2. The famous pencil contains the following components, weight. %: Printing ink15 Dutch soot15 Chalk, ground 20 Gypsum for construction20 Technical paraffin30 The disadvantage of the famous pencil is that it has high rigidity and is applied well only on warm surfaces. In addition, the cost of such a pencil is relatively high. The purpose of the invention is to regulate the hardness of the pencil and reduce its cost. This goal is achieved by the fact that the proposed pencil for marking construction materials, including paraffin, chalk and pigments, additionally contains distillation residues of raw benzene in the following ratio of components, wt. %: Paraffin20-46 Mel34-46 Pigments9-15 Low residue distillation of raw benzene 12-20 As pigments, iron minium (for red pencil), gas soot (for black pencil), dry ocher (for yellow pencil) are used. ). A marking pen is prepared by melting the paraffin and successively mixing the components at 80-90 ° C and casting the mass into molds. After cooling, the pencil is suitable for use. The pencil is used for marking works on concrete, glass, wood, linoleum, metal and other building materials. The compositions of the proposed pencil are given in table. one.

t; about l II II, and Composition, wt. %

Comp; 1sites

thirty

4 about 10 about 15

34

9

12 recti

All pencils can be used for marking construction materials, but the composition 1 pencil is most suitable for marking on smooth surfaces, while on rough surfaces it leaves a bad mark. Suitable for glass, metal, smooth surfaces of concrete, linoleum. The most acceptable surface temperatures are from 10 to 60 ° C.

For rough surfaces (kirnich, loose concrete, silicate tiles, etc.)

Pencil compositions 2 and 3 are most convenient, since they are significantly softer than composition 1. Pencil composition 2 marks building structures well at temperatures from -5 to + 20 ° С, and 3 - at -30- + 10 ° С. at higher temperatures, these pencils leave a too thick line with a high consumption of pencil and are easily smeared, although under any conditions they leave a well-marked mark.

For 4 hours, the trail from the pencil is not washed off with water (they are not tested for a longer time), when trying to erase the inscription on the concrete, there are quite distinguishable marks, while along the main trace the paint goes deeper into the vapor.

In tab. 2 presents the properties of the known and proposed pencils.

T a b l I c and 2