Next get a table. Tilt it forward slightly, as in this position you will find that work can be done better than if a level surface were used.
For those who will go to the small expense of building a table, I show it in Figure 2.
RULING.
You can use a Tee Square much more rapidly and accurately than an ordinary rule. The inches can be marked off on your tee in order to center the card.
FOR LINING.
Soft charcoal is the best on coated cardboard. Should your cardboard be a little rough, a delicate lead pencil mark will be better. Charcoal marks on coated boards can be easily erased with a soft piece of cloth; or, better still, a piece of chamois.
MIXING.
Use a palette knife with a flexible blade, about ½ × 3½ inches. Find a square piece of glass, or, not having a square piece, use any shape you have handy. I will explain later to what use the glass is to be put.