THE UTENSILS.
THE MARBLING TROUGH.
The marbling trough is a long flat oblong box of about 20 inches in length, 10 inches wide, and 1-1/4 inches deep inside, and should be painted within with white oil-paint so that the size appears light making the colors more readily discernible.
This trough must have inserted on one side a sloping partition of sheet zinc so that the waste of color may be skimmed over it by aid of paper slips or a piece of wooden board without running it over the top.
In addition to the trough containing the marbling size, a second smaller trough or basin of 10 inches width, and 1-1/4 inches depth is necessary for the reception of the waste of color. This is to be placed, while marbling, immediately to the left of the first trough.
SIZE SKIMMER.
This is a piece of wooden board about 2 inches high, about 1/4 inch thick and of the exact width of the trough. At both ends the board is slightly wider than the trough, protruding, and while the larger part of the board moves over the surface of the size, the projecting ends act as guides by sliding over the rim of the trough. In this way the board is always kept in a like position and serves to remove the air bubbles and films and also the color waste.
Recently, strips of blotting paper 1 inch wide have been frequently and successfully used for the removal of waste of color. They are applied in the same manner as the board.