I’ve cleaned the workspace enough to set up another triple batch.
Open door, or turn on exhaust fan to ventilate (30% Aqueous Ammonia is Fragrant, to say the least).
- 50ml TEOS –> 150ml
- 40ml Ethyl, 199.9 Proof –> 120ml
Place in 500ml Pyrex w/spinner on Mixer #1, labeled “Fast”. Place cover on Pyrex.
- 70ml Distilled H²O –> 210ml
- 2.42ml .5 Molar Ammonia Fluoride (twice listed amount) –> 7.26ml
- .275ml 30% Aqueous Ammonia –> .825
- 35 ml Ethyl, 199.9 Proof –> 105ml
Place in 500ml Pyrex w/spinner on Mixer #2 labeled “Faster”. Cover Pyrex and wait for 5 minutes.
Remove Pyrex with Ammonia-Ethyl-Water mix. Transfer TEOS-Ethyl Mix to “Faster” Mixer. Uncover A-E-W Pyrex, remove Spinner (Magnet & Nail outside Pyrex…) , uncover TEOS-E Pyrex, and slowly add A-E-W mix to spinning Mixture. Cover & Wait 5 Min.
Place molds on flat, clean workspace. Remove Pyrex from Mixer, Uncover Pyrex, Remove Spinner #2 with approved method (above), pour PreGel into the molds, a little at a time, and when full, cover for 24 hours.