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Coating cores with hot wax or strippable plastic is a widely used preservation method that involves wrapping the core in plastic wrap and aluminum foil and then dipping the core in paraffin or a plastic sealant. The steps to preserve a core using this method are as follows:

Coating cores with hot wax or strippable plastic is a widely used preservation method that involves wrapping the core in plastic wrap and aluminum foil and then dipping the core in paraffin or a plastic sealant. The steps to preserve a core using this method are as follows:

[[File:Table rose time-value-of-money 1.jpg|thumbnail|'''Table 2.''' Chemical reactivity of Barex and Saran Wrap]]

* Wrap the core in several layers of plastic wrap or film to prevent fluids in the core from contacting the outer wrapping of aluminium foil. Of the commercially available food wraps, Saran Wrap&reg; has been found to be the least reactive with formation fluids. However, the wrap has been found to degrade with some hydrocarbon compositions ([[:Image:Table rose time-value-of-money 1.jpg|Table 2]]).<ref name=Hunt_etal_1988>Hunt, P. K., and S. L. Cobb, 1988, Core preservation with a laminated, heat-sealed package: SPE Formation Evaluation, v. 3, n. 4, p. 691-695.</ref>. Barex&reg; film, which is relatively inert against organic solvents and corrosive fluids, can be used, but it is inflexible and difficult to wrap around core.<ref name=Hunt_etal_1988 />

 

|+ Table 2. Chemical reactivity of Barex and Saran Wrap  

# Then wrap the core in two or three layers of heavy duty aluminum foil. The edges should be crimped. The aluminum foil acts as a vapor barrier ([[:Image:Table rose time-value-of-money 1.jpg|Table 3]]).

# Then wrap the core in two or three layers of heavy duty aluminum foil. The edges should be crimped. The aluminum foil acts as a vapor barrier ([[:Image:Table rose time-value-of-money 1.jpg|Table 3]]).