FREE BOOKS

Author's List




PREV.   NEXT  
|<   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   73   74   75  
76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   >>  
rnish with a flat camel's-hair or sable brush. In an hour after application the surface is perfectly dry. =French Varnish for Cabinet-work.=--Take of shellac 11/2 oz. gum mastic and gum sandarach, of each 1/2 oz., spirit of wine by weight 20 oz. The gums to be first dissolved in the spirit, and lastly the shellac. This may be best effected by means of the water-bath. Place a loosely-corked bottle containing the mixture in a vessel of warm water of a temperature below the boiling point, and let it remain until the gums are dissolved. Should evaporation take place, an equal quantity to the spirit of wine so lost must be replaced till the mixture settles, then pour off the clear liquid for use, leaving the impurities behind; but do not filter it. Greater hardness may be given to the varnish by increasing the quantity of shellac, which may be done to the amount of one-twelfth of the lac to eleven-twelfths of spirit. But in this latter proportion the varnish loses its transparency in some degree, and must be laid on in very small quantities at a time. =Mastic Varnish.=--Mastic should be dissolved in oil of turpentine, in close glass vessels, by means of a gentle heat. This varnish is extensively used in transparencies, etc. =Cabinet-maker's Varnish.=--Take 5 lbs. very pale gum shellac, 7 oz. gum mastic, 1 gallon alcohol. Dissolve in a cold atmosphere with frequent stirring. =Amber Varnish.=--This is a most difficult varnish to make. It is usually prepared by roasting the amber and adding hot linseed-oil, after which turpentine can be mixed if required. But for a small quantity, dissolve the broken amber, without heat, in the smallest possible quantity of chloroform or pure benzine. Heat the linseed-oil, remove it from the fire, and pour in the amber solution, stirring all the time. Then add the turpentine. If not quite clear, heat again, using the utmost caution. =Colourless Varnish with Copal.=--To prepare this varnish the copal must be picked; each piece is broken, and a drop of rosemary-oil poured on it. Those pieces which, on contact with the oil, become soft are the ones used. The pieces being selected, they are ground and passed through a sieve, being reduced to a fine powder. It is then placed in a glass, and a corresponding volume of rosemary-oil poured over it; the mixture is then stirred for a few minutes until it is transformed into a thick liquor. It is then left to rest for two hours, when a
PREV.   NEXT  
|<   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   73   74   75  
76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   >>  



Top keywords:

Varnish

 

varnish

 

quantity

 

spirit

 
shellac
 

mixture

 

dissolved

 

turpentine

 

broken

 

linseed


pieces

 

poured

 

rosemary

 
stirring
 
Cabinet
 
mastic
 

Mastic

 

smallest

 

benzine

 

remove


chloroform

 

Dissolve

 

alcohol

 
gallon
 

frequent

 

prepared

 
difficult
 
roasting
 

adding

 
required

atmosphere
 

dissolve

 
powder
 

volume

 
reduced
 

ground

 

passed

 
stirred
 

liquor

 

minutes


transformed

 
selected
 

utmost

 

caution

 
Colourless
 

solution

 

contact

 

prepare

 
picked
 

proportion