California Code of Regulations
Title 4 - Business Regulations
Division 3 - Bureau of Household Goods and Services
Article 11 - Latex Foam Rubber and Filling Regulations
Section 1329 - Definitions and Grades of Latex Foam

(a) Latex foam is used as a filling material in various bedding products including mattresses, futons, and bed pillows. The term "Latex Foam" or "Latex Foam Rubber" may be used interchangeably and shall mean filling material made from synthetic latex foam (polychloroprene), natural latex foam, reclaimed rubber or rubber-like materials or a mixture of the above. The cured foam shall consist of a network of open or inter-connecting cells uniform in size and character. Latex foam may be used as a molded fill containing an outer skin or as slabstock fill (sheets, strips or other specific shapes) cut to specific sizes and containing no skin. Latex foam rubbers may be either cored or solid.

(b) The term "first quality" may be used in conjunction with the terms latex foam or latex foam rubber provided the foam does not exceed a minor level of physical defects such as a surface or internal voids of up to one inch, loose skin up to 16 square inches, foreign materials up to 1/8 inch in diameter, shinkage marks up to 1/8 inch in depth, pock marks or pour patterns up to 1/8 inch in depth.

(c) Irregular Latex Foam or Irregular Latex Foam Rubber shall mean any foam which has a moderate level of physical defects, such as surface or internal voids 1 to 3 inches deep, 16 to 32 square inches of loose skin, foreign materials 1/8 to 1/4 inch in diameter, shinkage marks between 1/8 and 1/4 inch in depth, pock marks or pour patterns 1/8 to 1/4 inch in depth.

Labeling example: Irregular Latex Foam Rubber

(d) Scrap Latex Foam or Scrap Latex Foam Rubber shall mean any foam which contains an excessive amount of physical defects such as surface or internal voids exceeding 3 inches, loose skin over 32 square inches, foreign materials over 1/4 inch in diameter, shinkage marks over 1/4 inch in depth, pock marks or pour patterns over 1/4 inch in depth, and also means any latex foam product consisting of loose pieces of latex foam or assembled loose pieces of latex foam (excluding assembly of the molded half sections).