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A procedure for the manufacture of a material similar to Horn, Bone, Ivory and other similarComposed of a mixture of formaldehyde and phenol in Union with other organic or inorganic materials to give consistency and Colour.
A procedure for the manufacture of a material similar to Horn, Bone, Ivory and other similarComposed of a mixture of formaldehyde and phenol in Union with other organic or inorganic materials to give consistency and Colour.