PASTES AND PAPER PULPS 261 



91.— Flour Paste (Oil) (M.B.) 



Flour . . 10 oz. by measure (or 7 oz. by weight) 



Linseed-oil . . 5 oz. by measure (or nearly 5 oz. by weight) 



Stir well together, and boil slowly in a water bath (glue- 

 kettle) for two or three hours, and afterwards unite this with 

 the water paste in the following proportions and manner : — 



92. — Combination Pulp (M.B.) 



Water flour paste (Formula 90) . . 5 oz. by measure 



Oil „ „ (Formula 91) . . 5 oz. „ „ 



Tissue-paper . . . .6 sheets 



The two pastes are mixed together, and spread thinly with 

 a spatula upon the sheets of paper, and these are laid one 

 upon another as done. The whole of them are then rolled 

 together and kept in a cool place, in an air-tight jar or other 

 receptacle, until wanted, but not for less than three days, when 

 they are well and intimately pounded in a metal mortar with 

 the addition of a very little Venetian Red. The composition, 

 which is to be used fresh, is well and firmly kneaded like putty 

 in the fingers, and pressed into the mould with the fingers and 

 with a rough cloth, and finally with wadding to remove super- 

 fluous oil. 



Should the pulp, however, after lying by for some time, be 

 found to become dry and unworkable, 2, and sometimes 3 oz. 

 of flour paste Formula 90 must be added. 



The mould should not be oiled immediately before using, 

 but some days should intervene. The pulp model is finally 

 backed with six layers of brown paper for subjects of ordinary 

 size, the number of layers being increased for large fishes, etc. 



The detailed method of applying the combination pulp is, 

 when a sufficient quantity is got together, to press it into the 

 mould (oiled some time previously) with the fingers to the 



