pierods
Good morning,
Where can I buy a set of scales for weighing ingredients for baking?
They need to be accurate to 1 gram.
Thank you.
Gast
I have this one:
www.soehnle.de/produkte/kuechenwaagen/digitale-kuechenwaagen.html?sy_produkt[id]=146&cHash=8049c42b07
It weighs in 0.1g increments. Works perfectly!
Best regards,
Wolfgang
pierods
Thank you very much!
Bonderer
[sub][size=4]Why make your own photochemical solutions, if I may ask?[/size][/sub]
[sub][size=4]There are [/size][/sub][sub][size=4]such cases with photochemical products – old, very old, but also new formulations, all of which are well-established. There isn’t a ‘jack-of-all-trades’ solution here, but if it were possible, we’d already have it. To achieve that, you’d need the basic substances in their purest, anhydrous form. Then there’s the pH value, water quality and a whole host of other factors that come into play. Photochemical products are, and can only ever be, compromises; alongside health risks, shelf life and such matters, the stuff is also supposed to be affordable and easy to handle. I deal with chemicals professionally
and in that context, the larger the quantity, the better and more precisely I can prepare my solution and adjust it to specific parameters
. Manufacturers will make 1000-litre batches (or more), and with such a quantity, one gram makes no difference. If you make it yourself...
Incidentally, a reading of 0.1 g on a scale does not necessarily mean that is accurate. Scales simply have certain measurement inaccuracies that should not be ignored, which is why calibration offices exist – so that we are not cheated when shopping.
Pharmacy scales or beam balances are much more accurate and calibrated. The specialist weighing equipment supplier has the weights. It gets even more difficult when sourcing
raw materials. The pharmacy’s list of toxic substances is still the lesser obstacle when making your own preparations... But if I want good to very good raw materials,
who guarantees that what I receive is actually good? It might well be contaminated; I can’t tell. If I order quantity X as a company
in its purest form, I receive a certificate stating what I’m getting – at least that’s how it should be. However, anyone who can should also check what they’re buying – incoming goods inspection; better safe than sorry.[/size][/sub]
[sub][size=4]Making a developer is a very complex process; every detail matters, and you have to work with the utmost precision according to the formula. [/size][/sub]
[sub][size=4]There are plenty of ready-made developers available, whether for film or paper, from a wide range of manufacturers – so what’s the point of making your own?[/size][/sub]
pierods
Thanks, Analoger,
but in these [size=4]cases involving experienced developers, I can't find D-23...[/size]
Wolfgg
In photochemistry, you don’t need a high degree of accuracy; instead, you need to be able to weigh even small quantities. I’ve never needed anything more accurate than +/-5%, but I do need to weigh down to 1 mg. If you want to save money on a laboratory balance, here’s how to do it (original link dead, only accessible via the Wayback Machine):
http://web.archive.org/web/20091026231823/http://geocities.com/ResearchTriangle/Thinktank/5693/waage2.html
It would also be fitting for a ‘raw chemistry geek’.
With a 10mm x 10mm, 50cm-long angle aluminium bar from the DIY store, cleverly mounted as a beam, you can actually still weigh 1mg with 10% accuracy. Tested it myself.
Regards, Wolfgang
Zeze
There are still plenty of recipes in old photo books that you might want to try out. Or recipes for photographic chemicals that are no longer available on the market.
It makes sense to those for whom it makes sense.
;)
