Turpentine mordant. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Turpentine mordant. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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As you know, when etching wood, solutions of organic paints in water or alcohol are still used. This method, however, has one significant drawback: the surface of the painted wood becomes rough from alcohol or water, as a result of which, after etching, it has to be smoothed with glass sandpaper, and the applied paint is erased in places by such grinding and a second coating is needed, which entails a new grinding and so on, until you get a perfectly smooth surface.

The mordant patented by the Yungas company in Württemberg consists in the fact that instead of alcohol or water, the paint thinner is turpentine. When using such stains, the wood fibers do not swell at all, which eliminates the appearance of roughness, and therefore the need for grinding.

Depending on the structure of the wood, whether it is finer or coarser, one or two coatings are sufficient to obtain the desired shade. The solutions themselves look like walnut, rosewood, light or dark oak, etc. are prepared in the usual way with the replacement of water or alcohol with turpentine.

So, to get a good mordant under the walnut tree, dissolve 600 g of brown paint and 15 g of orange in 1 liter of turpentine. Then the solution is filtered and a filtered solution of 100 g of black paint in 3 liters of turpentine is added to it. If the resulting mordant turns out to be thick or inappropriate for the required tone, it is diluted with turpentine.

Author: Korolev V.A.

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Miniature oscillators 32,768 kHz from Geyer 27.11.2018

Geyer has released 32,768 kHz oscillators which, unlike conventional crystals (quartz resonators), are active clocking components with higher precision.

The KXO-V32T 32,768 kHz 20ppm 3,3V generators have an initial frequency spread of only 3ppm (instead of 10 ... 20pmm for conventional clock resonators), and the temperature stability of the frequency falls within the range from 10ppm (typical value) to 20ppm (maximum value). In conventional resonators, the temperature stability at the upper limit exceeds 100ppm.

The main advantages of the generator in comparison with a conventional quartz resonator:

they do not require matching circuits (no need to calculate and install additional capacitors C1, C2);
no need to carry out initial calibration and frequency adjustment;
there are no problems with matching the "clocking component - microcircuit" circuit.
Another advantage of the KXO-V32T 32,768 kHz 20ppm 3.3V generator is its miniature "typical case": 3,2-1,5 mm. It is identical in size to the case of conventional watch quartz resonators. This generator is designed to operate in the industrial operating temperature range: -40...+85°C.

Features:

case: 3.2-1.5 mm;
frequency: 32,768 kHz;
initial accuracy: +-3 ppm;
temperature instability: +-20 ppm;
supply voltage: 3.3 V;
output: HCMOS;
operating temperature range: -40...+85°C.

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