What is in glass etching creams?
Things found in etching creams: Barium Sulfate, Sulfuric Acid, Sodium Bifluoride, and Ammonium hydrogen difluoride.
Hydrofluoric acid is the main ingredient that will etch glass. Overall, the cream is a diluted form of hydrofluoric acid. It's not nearly as dangerous as pure hydrofluoric acid but still, be very cautious when using it.
apparently etching on the base of a beer glass, ie the carling glass which is laser engraved on the base improves the taste! might be a myth! Also there is a CE stamp engraved to state the imperial measurement in the UK which is a legal mark to state the glass holds a pint. http://en.wikipedia.org/wiki/Pint_glass For fun you can have a pint engraved as well: http://www.keepitpersonal.co.uk/engraved-beer-glass-traditional-pint-glass-p-742.html
There is no safe formula for etching glass because all chemical etching solutions for glass contain floride compounds which are extremely hazardous when absorbed through the skin or eyes, or inhaled or ingested, even the ones found in craft stores. If you are uncertain about how to use these compounds safely, you should consider sand blasting your design instead. Small, economical pen sized blasters are available that require little air.
Some spots on glass shower doors are caused by etching of the glass by cleaning chemicals such as soap. Soap is alkaline and can therefore etch or "eat into" glass. Some spots are a buildup of lime. For these a wash down with vinegar can sometimes help. There are some products available to coat glass to reduce spot maks and etching. Some are designed for use before the spotting has ocurred to ptotect the glass…
Most microfluidics use "standard" lithography techniques for patterning hard substrates such as glass or silicon. This would entail spinning photoresist, then exposing and wet etching in KOH (silicon) or HF (glass) or dry etching in a reactive ion etcher or deep reactive ion etcher. Soft lithography is also common in microfluidics where a mask is created using a hard material such as patterned SU-8 or etched glass. A polymer such as PDMS is then cast…
Check antique shops , or ebay, I see a nice one in Bristol currently. Has a sailing ship frosted / etched on it. Or buy a clear one and have it frosted, an acid dip or etching process. Not an uncommon request for custom acid on glass work. Many wedding and anniversary glass items are etched for personalization.