Polyester Wax
Polyester Wax with a melting point of 37°C.
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Polyester embedding medium with a low melting point of 37°C. 500g.
Polyester Wax is another synthetic wax devised by Dr H. F. Steedman, Department of Zoology, the University of Glasgow (now at Bath University of Technology), as a ribboning embedding medium (Nature, 1957, 179, 1345). Its main advantage over paraffin wax and ester wax is its low melting point (37°C), which results in the reduction of tissue hardening and shrinkage and obviates the use of infiltration ovens.
The wax is soluble in most organic solvents, including alcohols, ethers, esters, ketones and hydrocarbons: warming to 25°C facilitates solution. The wax has good water tolerance, is almost opaque, and sections easily. No electrification of ribbons occurs during cutting. Sections of 2 microns and more may be cut at room temperatures between 10° and 22°C.
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