The Voice of the Finishing Industry since 1936

  • PF Youtube
  • PF Facebook
  • PF Twitter
  • PF LinkedIn
9/12/2012 | 1 MINUTE READ

Controlled Skinning

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Can you recommend a low-cost, industrial, clear glossy alkyd medium that can produce the skinning effect you get with some stored alkyd paints?

Q. I am an artist and am looking for a way to produce the skinning effect you get with some stored alkyd paints. I am looking for a low-cost, industrial, clear, glossy alkyd medium (base, varnish, etc.) product that will do the skinning effect for me. I have experimented with several alkyd mediums, and they dry without skinning when left to air dry. I understand the alkyd medium needs to be exposed to air in order to wrinkle like skin. That’s exactly what I need, as long as I can always repeat that effect with the same product. Can you please recommend a low-price medium that I can use for my art? I.S.

A. The term “medium” used by I.S. refers to a clear matte or gloss finish used by artists. It often is used as an overcoat as well as an extender to reduce the hiding power of an artist’s colors to get special effects.

Many paint manufacturers have been adding anti-skinning agents to paints for several years to prevent skinning, so it’s no wonder you couldn’t get your alkyd varnish to skin.

The best approach for you to get controlled skinning is to add a drier, such as cobalt napthanate, to an alkyd varnish. The reaction mechanism for curing alkyds resins is free radical polymerization, which results from contact with oxygen. Driers are organo-metallic compounds that catalyze and/or accelerate the polymerization of paint and varnish vehicles. 

Related Topics

RELATED CONTENT

  • The Importance of Particle Size in Liquid Coatings

    Coating problems and solutions associated with particle size reduction...

  • Masking for Surface Finishing

    Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.

  • Is Your Electroplating Waste Hazardous?

    Some that bears precious metals is, and there are a host of regulations to consider when recycling.


Resources