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Why is there no electronic optical pyrometer ?
Inexpensive optical detectors are not evenly sensitive over their designated colors. Black body emis ...
3-1-2021 at 22:08
by: densest
Lamp work - hollow glass sphere
Please forgive me if I'm writing things you already know. I hope this helps.

There are lots of fl ...
3-1-2021 at 21:37
by: densest
Does nuclear fusion really solve problems ?
As usual in the real world things are messy. Fusion, fission, and renewables all fit different usage ...
1-1-2021 at 21:48
by: densest
The insanity that is OHS
There is a perfect storm of opinion to shut down everything unusual especially in science. IMnot soH ...
15-12-2020 at 15:06
by: densest
Why is Chemsavers comfortable with shipping chemicals to residential addresses, but sigma/fisher/TCI/etc are not?
I suggest reasons why chemicals are less and less available to the amateur or home-business chemist: ...
8-12-2020 at 14:14
by: densest
5-atz purchase in the US? Would authorities care?
Thanks for the reassurances! I'm a bit paranoid, perhaps. I've seen fire marshals & ATF official ...
27-11-2020 at 16:12
by: densest
5-atz purchase in the US? Would authorities care?
I'd like to get some 5-atz as a fireworks fuel. It's available online from US sources. Does anyone k ...
26-11-2020 at 15:32
by: densest
Calcium Hypochlorite to Perchlorate
Agreed, keeping organics away is essential. IIRC reading that KClO3 alone can detonate if sufficient ...
24-11-2020 at 10:33
by: densest
smokeless fireworks patent gone walkabout: nitrocellulose/dicyandiamide
Thanks to both!

aromaticfantastic - I'm trying to -avoid- using anything that might be considere ...
24-11-2020 at 10:06
by: densest
DIY temperature probe for hotplate, help!
Making an -accurate- replacement might not be easy to fabricate. Even if you figure out what the sen ...
23-11-2020 at 21:21
by: densest
smokeless fireworks patent gone walkabout: nitrocellulose/dicyandiamide
There are a number of patents for smokeless fireworks using nitrocellulose fuel modified with accele ...
23-11-2020 at 20:24
by: densest
Calcium Hypochlorite to Perchlorate
chlorates can detonate under the right conditions - see "cheddite". They very powerful oxidizers. If ...
23-11-2020 at 15:42
by: densest
A dilemma with molasses and pH control
You have an interesting problem!
This is to make something to be distilled?

If you haven't found ...
1-11-2020 at 21:37
by: densest
How is yeast dried so its viable when re-hydrated
"Yeast: The Practical Guide to Beer Fermentation" Chris White with Jamil Zainasheff, Brewers Publica ...
1-11-2020 at 20:59
by: densest
Simple exploding wire apparatus for nanopowders
If anyone is still working on this, here's what I've seen about exploding wires: You may already kno ...
1-11-2020 at 10:50
by: densest
how to pump nitric acid?
One way valves made with thin Teflon flaps are feasible. It's flexible enough for that.
I have a di ...
22-6-2020 at 10:52
by: densest
HHO Flame Generator for Glaswork
Are you trying to work borosilicate (Pyrex, etc.) or quartz? For boro, propane/oxygen is the accepte ...
22-6-2020 at 10:17
by: densest
Mine platinum from the dust next to highways
IIRC a hydrogen-oxygen torch is hot enough to melt platinum. A 250 cu ft. tank of each might cost $U ...
3-11-2016 at 13:13
by: densest
Making Al powder yourself ?
Ball mills are discussed in fireworks discussions. Look for a publication by Sponenburg on amateur b ...
3-11-2016 at 12:28
by: densest
Soxhlet thimble help
Cellulose thimbles are available on ebay, labx, etc. at 10-15% of list. You can make your own from f ...
22-10-2010 at 22:42
by: densest
do-it-yourself nuclear magnetic resonance spectroscopy
If you have a "good enough" bandpass filter on your input, there is no energy in the images produced ...
15-10-2010 at 21:17
by: densest
Medical Laser
The disks-with-spacers in pict0009 are almost certainly selenium rectifiers. It points to a pre-sili ...
6-10-2010 at 22:41
by: densest
do-it-yourself nuclear magnetic resonance spectroscopy
The DS1085 spec doesn't include short-term frequency stability or phase noise. That suggests it isn' ...
28-9-2010 at 22:10
by: densest
Why has Mg no flame color ?
If one burned Mg in Cl2 then the discrete spectrum of Mg might show up. In making fireworks, Mg is u ...
20-9-2010 at 19:37
by: densest
Capsaicin extraction and isolation
@E-tech - the "hot" in mustard is mostly allyl isothiocyanate CAS 57-06-7 which has been used as a w ...
15-9-2010 at 10:22
by: densest
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