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cements, opticians
Значение термина cements, opticians в knolik
cements, opticians - Cements, Opticians
cements, opticians - The cements obtained from the following formulae are used by opticians for fixing lenses, prisms, etc., to chucks and holders, while they are being ground.
- Pitch, 5 parts; wood ashes, 1; tallow, 1, less or more, according to the temperature of the season.
- Shellac softened with rectified spirit or wood naphtha.
- Beeswax, 1 oz.; resin, 15 oz.; melt and add 5 oz. of whiting previously heated red hot and still warm.
- Resin, 1 lb.; melt and add dry and warm plaster 4 oz. This forms a very strong cement for rough purposes.
Рядом со словом cements, opticians в knolik
| cements, naturalists | В начало буква "" буквосочетание "" | cements, parabolic |
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