Gun Cotton - When to make in advance?

Hi all,

Quick question regarding gun cotton. I checked the CLEAPSS risk assessment SRA14 which states you can't store it for obvious reasons, but it doesn't say how far in advance to make it in order to allow the cotton to fully dry. I assume a day in advance?

Thanks
 
I think we used non-absorbent when we did it last year (our school is less than 2 miles from the site of the 1871 Guncotton explosion - I live just off Guncotton way) so we made it for a year 9 joint Science/history Deep Learning Day.
 
I think we used non-absorbent when we did it last year (our school is less than 2 miles from the site of the 1871 Guncotton explosion - I live just off Guncotton way) so we made it for a year 9 joint Science/history Deep Learning Day.

Thanks! I did it with absorbent and while it worked, it was a bit tricky to handle in the beaker since it became this solid blob! I'll try non absorbent and see if that works better.
 
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