This Pakistan Standard applies to vegetable parchment to be used for the wrapping of dairy and other food products. Such vegetable parchment may be of two kinds : (a) Hard neutral vegetable parchment, i.e. not con taining a softening agent. (b) Neutral vegetable parchment to which a soften ing agent has been added. Glycerine is the cus tomary softening agent and is the only one dealt with in this specification.
PS 809-1971由PK-PSQCA 发布于 1971-1-1。
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