Charles Robertson & Co · London : C. Robertson & Co. · leaf 24
grey. s. d. Tubes, single each 1 0 Tubes, large, as Illustration page 3 . . . . . . ( 4 6 A perfect Black for the Process Worker, being a pure pigment of greatintensity and from its opacity to be recommended for blocking out on photonegatives. s. d.Bottles, size as illustrated above . . . . . .… … Roster coLQlff Zinc White
Artists' materials
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