Similarly, he rarely uses all the colors spread out on his palette — a large sheet of glass — but he “likes to have them all there.” He lays out a fresh palette almost every day, often making slight adjustments, like a Mars yellow for an ochre, or cobalt for a Prussian blue. The texture and the weight of the paint are as important to Bloom as the tones. He likes the way zinc white dries, but finds it does not have sufficient body, so he adds an amount of white lead paste which he buys in 25 pound cans from Bocour. But, except for white, the pigment he uses most, he finds ready-made colors have too much oil, so he mixes powdered pigment in small quantities — enough to last a day or so — with his own medium, half dammar varnish, half stand oil. Unusually heavy, this medium resists the brush, qualifying his drawing and making his edges seem hammered out of metal. It dries fast enough to allow him to work on the picture the next day, but if the painting is put aside for any period, the artist, before working on it again, coats it with the medium to produce the tacky surface he likes to paint on, and also to soften the underpainting so that fresh colors are worked in and will not dry in a separate layer. Because of this method, his paintings do not crack despite the repeated use of varnish. Once his colors are mixed, he never adds more medium. If he wants a more fluid mixture or transparent glaze, he thins out the pigment with turpentine.