degreasing

[sumairp at operamail.com]

On 11 Jan 2002 10:33:40 -0800, rworth at oda.state.or.us (Richard Worth)
wrote:

>Hey group,
>Speaking of green coloration, does anyone know what that blue-green 
>staining is that you sometimes get on Pierids when you try to relax 
>them?  I've seen it in both those that were relaxed in glassine 
>envelopes and those not.  I originally thought it was something in 
>the envelopes but maybe not.  I never see it until relaxing begins. 
>Is there a remedy?
>Cheers,  Rich

It is probably due to high humidity at packing, which then condenses
into a small water droplet when stored, usually in a cooler location.

Spots can also appear when relaxing if the humidity level is too high,
because of temperature drop in the evening.

Cheers,


 
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