<whitequark>
seems like the additive is mostly fluorosurfactants, a few organic acids and a metal sulphate
<whitequark>
lead or cadmium, I *hope* it is lead
<whitequark>
or maybe it's just pure acid
<whitequark>
yep, vendor says it is pure acid
<whitequark>
good
<DocScrutinizer05>
is it *that* hard to get something simple like sulfuric acid in .ru?
<DocScrutinizer05>
I mean, stuff labeled as "pure sulfuric acid"
<DocScrutinizer05>
I dunno what's the situation now, last time I bought such stuff in next drugstore or pharmacy, but that's like 40 years ago
<DocScrutinizer05>
last chemical experiments (1kg of flash powder based on Mg an KMnO4) been with support of a friend who had a chemicals store
<DocScrutinizer05>
about 15 years ago
<DocScrutinizer05>
btw that was a pretty disappointing experience, mostly due to lack of a proper mill to crack the KMnO4 crystals into proper dust
<DocScrutinizer05>
probably should have tried some recrystallization
<DocScrutinizer05>
btw the "underwater thunderstorm" experiment is really cool ;-). You could aslo test your battery acid this way, I guess. layer some ethanol over sulfuric acid in a small test tube you better place into a huger water bath, then throw one crystal of KMnO4 into that
<whitequark>
DocScrutinizer05: yes, exactly that hard
<wpwrak>
keep on searching for the right formula. Pro Tip: if the patent application contains the string "stabilize with FOOD", then you're on the right track.
<whitequark>
there is 1 shop I found which will send dilute 15% acid to individuals
<whitequark>
and it only ships from SPb, which is rather inconvenient
<whitequark>
acids >15% aren't sold to individuals under any circumstances whatsoever
<whitequark>
no regulation for other mineral acids
<whitequark>
despite that, there are very very few vendors who send even diluted acids to individuals
<wpwrak>
so put "whitequart industries" in the first line of the address :)
<whitequark>
nah, they'll ask you to pay in the appropriate way companies do
<DocScrutinizer05>
wtf do you dilute acetone and permanganate with?
<wpwrak>
or find a supplier nearby so that you can visit them with a bottle of vodka. a fair trade: you bring a bottle of vodka, you leave with a bottle of concentrated whatever.
<whitequark>
DocScrutinizer05: acetone → water, permanganate... I guess water too
<DocScrutinizer05>
err
<wpwrak>
DocScrutinizer05: peroxide ? :)
<DocScrutinizer05>
KMnO4 in water isn't stable
<whitequark>
DocScrutinizer05: ethanol then?
<DocScrutinizer05>
and I doubt acetone will mix with water
<whitequark>
acetone absolutely does, it is quite polar
<wpwrak>
whatever sludge the ministry of nuclear waste disposal pays you to get rid of for them ?
<DocScrutinizer05>
so you say you can't get any crystalline KMnO4?
<whitequark>
I don't think so
<DocScrutinizer05>
weird
<whitequark>
used in organic synthesis as oxidizer
<DocScrutinizer05>
I however wonder what those 40% are meant
<whitequark>
basically if you want to do any organic synthesis you're fucked, because all common compounds are restricted
<whitequark>
"can be used to make narcotic drugs", my ass
<whitequark>
hands and brain also can be used for that, better restrict them too
<DocScrutinizer05>
KMnO4 is not really soluble in water to amounts of >40% of weight or volume, or mol, I guess
<whitequark>
I have no clue
<DocScrutinizer05>
anyway, bluebox alarm, the zombie leaves his cage
<wpwrak>
pro tip: catch the skull "sideways". then it'll be caught in the paddle, move left and right but no fly odd (until you move the paddle away)
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<DocScrutinizer05>
well, lucky enough I had my my last Absolut100 *before* I ran into this
<whitequark>
you drink vodka?
<DocScrutinizer05>
sure, nothing else usually
<DocScrutinizer05>
this "game" is shite though, I keep the arrow keys hammered and nothing moves
<DocScrutinizer05>
:-(
<DocScrutinizer05>
while the "ball" bounces out
<whitequark>
hmmm
<whitequark>
thats weird
<DocScrutinizer05>
huuuuge delays
<whitequark>
do you use IE6 ?
<whitequark>
oh, delays. so you run latest chrome on pdp-11? :p
<DocScrutinizer05>
WUT?
<whitequark>
what I mean is that any recent-ish browser on recent-ish machine shouldn't have any problems *shrug*
<whitequark>
sadly JS games have thrown us back in performance by factor of somewhere between 100-1000
<DocScrutinizer05>
jr@saturn:~> time for ((i=0; i<1000000; i++)); do :; done
<DocScrutinizer05>
real 0m3.826s
<DocScrutinizer05>
user 0m3.761s
<DocScrutinizer05>
sys 0m0.060s
<whitequark>
will be a while before moore's law catches on. or maybe we'll never regain it, seeing as JS is strictly single core and moore's law works on multicore for several years
<whitequark>
4.8s on my machine
<dos1>
4.8s and game works nice on Konqueror
<whitequark>
I'm impressed, what is this beast you run that a ivy bridge i7 with 12G of RAM and an SSD can't beat?
<DocScrutinizer05>
i5
<DocScrutinizer05>
8G, SSD
<dos1>
but I think it's using onkeypress instead of onkeydown/up, so the "delay" may depend on the key repeat delay
<whitequark>
though, I wonder what is the bottleneck in this test
<dos1>
laptop, i5, 8G and SSD here ;)
<whitequark>
DocScrutinizer05: cat /proc/cpuinfo | head -n 30|grep 'cache size'
<DocScrutinizer05>
cache size : 6144 KB
<whitequark>
mine is 4096 KB, so my guess is likely right
<dos1>
3072 KB
<whitequark>
it's cache-bound
<whitequark>
that's basically a fork() benchmark
<DocScrutinizer05>
booze down to zilch, gotta leave to get more
<whitequark>
so you're just sitting there alone drinking vodka?
<whitequark>
are you sure you aren't russian and/or alcoholic? :p
<DocScrutinizer05>
I did, now it's over
<DocScrutinizer05>
no, I drank vodka and am still listening to B52s
<DocScrutinizer05>
and that's actually something I missed a lot, just sitting there and listening music with a glass of vodka
<DocScrutinizer05>
and now I'm again in fron of this brainkiller
<DocScrutinizer05>
o/
<whitequark>
okay...
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<wpwrak>
real 0m7.663s, sigh
<wpwrak>
still not too bad for an old Q6600
<wpwrak>
shows that things haven't improved much in the last demi-decade
<whitequark>
wpwrak: well, if fork performance is the only critical thing to you... ;)
<wpwrak>
(brainkiller) that would be bild.de then, i guess :)
<larsc>
I though he meant the vodka
<wpwrak>
(cpu performance) i suppose it's not all that different in may other aspects
<wpwrak>
larsc: hehe ;-) indeed, let's celebrate the traditional values ! :) nastrovje !
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<larsc>
could also be some kind of medication though. "I'm on prescribed brainkillers, the extra strong ones"
<wpwrak>
ah, that's the new anti-zombie vaccination, isn't it ?
<wpwrak>
let's see how long until you snap out of this "g-code as source" mindset :)
<whitequark>
so far I haven't found a CAM which works for me
<whitequark>
well, there's pcb-gcode which mostly works (but is for other things), and inkscape gcode plugin (which is also for other things and really only good for generating sequences of points
<wpwrak>
by the time you get to 3D, you'll have to, in one way or another
<whitequark>
wpwrak: what do you use?
<whitequark>
3D... well, if I need an arbitrary mesh, then sure, need some kind of CAM
<wpwrak>
for 3D ? fped :)
<wpwrak>
for 2D, fped (and happy with it) or kicad, depending on what it is i'm doing
<whitequark>
but mostly I don't want or need arbitrary mesh. I need a pocket here, a profile there.. which can be perfectly done with some handy gcode routines
<whitequark>
and when gcode will get a little unwieldy, I have plans for my own CAM :p
<wpwrak>
;-)
<whitequark>
based on a pure functional DSL, manipulating contours (and sometimes meshes), then spitting out them as gcode
<whitequark>
operations such as: make a contour for a primitive or a set of points; apply affine transform; intersect/union/subtract contours; pocket/profile by contour (with const TEA of course)
<whitequark>
I just need to bind to / port libarea/libkbool, and its insides gross me out *really badly*
<whitequark>
who the fuck even writes like that
<whitequark>
(╯°□°）╯︵ ┻━┻
<whitequark>
wpwrak: maybe that CAM will once be able to eat contours from FreeCAD, like heekscnc is supposed to (but the published version doesn't actually work)
<whitequark>
(and heekscnc is so horrible to use anyway, it's even much worse than freecad)
<whitequark>
*heekscad
<whitequark>
wpwrak: I do agree this approach is too repetitive though, e.g. manually writing out four egdes is not fun at all
<whitequark>
and that doesn't decompose into gcode subroutines cleanly
<whitequark>
hence, my own CAM
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<Guest54638>
do you have noise from you NN spk or headphones?
<Guest54638>
background noise, hiss,fissile that's noticeable when listening to music?
<Guest54638>
I find it more noticeable when using ear pieces than big headphones