THE LABORATORY. TEX 
unsatisfactory. ‘The drawings are made upon bristol board 
with an ink containing alum and these are given to the com- 
pany who produce facsimiles, but they are always muddy and 
blurred. 
For all other photo processes the drawings require that 
each line should be perfectly black and smooth. ‘The draw- 
ings should always be made on bristol board. No wash 
tints or pencil work will take, but all shades have to be ex- 
pressed either by lines or dots. Winsor and Newton’s liquid 
India ink produces good results, especially if more cake ink 
is rubbed up with it. 
Of the photo processes the photo-lithographic is the most 
satisfactory but this cannot be used along with press work, 
but requires separate plates. The various processes for pro- 
ducing raised plates (photo-electrotypes) do not vary much 
and the chief distinction between them seems to lie in the 
skillof the operators. ‘The writer has noticed, however, that 
by whatever process, if a poor electrotype resulted, it was 
always attributed to the fault of the one furnishing the draw- 
ing, and not to any fault of the photographer, electrotyper or 
of the process. 
