COLOURS. 411 



means of the solution of tin, when it yields a car- 

 mine little inferior to the former. 



Floroitine lake is the kind in general use, known 

 by the name of lake. It is used in water and also 

 in oil, but does not stand, which is much to be 

 lamented, as it is a very beautiful colour, and the 

 is no substitute that Vv^ill completely answer all the 

 purposes of lake. 



The best sort may be prepared from the sedi- 

 ment of cochineal that remains in the kettle after 

 making carmine, adding to it a small quantity of 

 cochineal, or Brazil-wood, and precipitating the 

 colouring matter with a solution of tin. 



Madder-lake is not so bright and rich a colour 

 as the last-mentioned lakes, but has this valuable 

 advantage, that it stands much better, and it may 

 answer many of the purposes of Florence-lake. 



It is prepared nearly in the same manner as the 

 foregoing. 



Rose-lake., This is generally called rose-pink. 

 It is a lake made by a basis of chalk, coloured by 

 Brazil or Campeachy v.^ood. It does not stand, 

 and is only used for house-painting and paper- 

 hanging. 



VermilUon, a bright scarlet pigment, formed 

 from sulphur and quicksilver. Its goodness is 

 known by its brightness, and by its inclining to a 

 crimson hue. It is a very useful colour in oil, 

 where it stands very well 5 but in water it is apt to 

 turn black. 



Red lead, or minium^ is lead calcined till it ac- 

 quires a red colour, by exposing it V\dth a large 

 surface to the fire. This colou.r is very apt to turn 

 black in water, and is therefore seldom used. 



Indian red. This colour is sometimes employed 

 to answer some of the pui'poses of lake. It is 



