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[formerly Aqualon division of Hercules] A registered trademark for a series of hydroxypropyl cellulose (HPC) compounds. Klucel® polymers are nonionic, water soluble, ethers of cellulose. They produce solutions that range in viscosity from 200 to 2500 centipoise. The Thermoplastic polymers are used as emulsifiers, stabilizers, film formers, thickeners, and sealants in many types of solutions such as foods, cosmetics, strippers, paints and glazes. They are also used as binders for ceramic glazes. Klucel® polymers also used as a sizing agents for Paper and consolidants for Leather. While HPC polymers, in general, have good photochemical stability, they can exhibit poor Thermal stability and discolor with age. Although the low molecular weight products, such as Klucel® G, performed better than the high molecular weight products, such as Klucel® M, testing indicates that HPC polymers should not be considered for long term use (Feller and Wilt 1990).


MFA- Klucel G.jpg

Synonyms and Related Terms

hydroxypropyl cellulose; Klucel® GF


Physical and Chemical Properties

  • Soluble in water (below 38C), ethanol, acetone and many organic solvents.
  • Insoluble in water (above 45C).

Resources and Citations

  • R.Feller, M.Wilt, Evaluation of Cellulose Ethers for Conservation, in Research in Conservation Series, Getty Conservation Institute, 1990, p. 94.
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989
  • Ceramics and Glass Conservation Section, List of Workshop Materials, The British Museum, London