How to clean lenses..

[Ori]

hello to all.
we use acetone and alcohol to clean lenses during certain production steps. there must be a better way (that will not kill my workers...).

what are you using?

[renee1111]

We use the same but also have mark away. There's nothing worse than removing progressive lens markings on poly with alcohol...mark away works wonders and lasts forever.

[scriptfiller]

All-Off to remove marks. Isopropyl Alc. to clean.

I'm not dead yet....

[YrahG]

Originally Posted by Ori

hello to all.
we use acetone and alcohol to clean lenses during certain production steps. there must be a better way (that will not kill my workers...).

what are you using?

That's the norm in production. If your concerned you can make sure your ventalation is circulating enough fresh air in and VOC's out.

[Comma]

No need to worry too much about acetone.
We all have acetone in our body naturally, from protein digestion (which produce cetone and acetone)
So we are used to eliminate it quite easily.
But in very high dose, there may be some problems regarding our filtration organs.
Just google it, you'll see by yourself.

About alcool, no explanation needed
depending of which one you use

[FVCCHRIS]

Must have something to do with those reports of "spontaneous" combustion. I've been using denatured alcohol for years (20+) to remove marks and clean lenses. In the last 2 years I have developed an extreme sensitivity to the stuff. The Ultra-Optics hard coat resin goes through my nitrile gloves and blisters my skin if I don't get the gloves off and wash right away.

[Chris Ryser]

Originally Posted by renee1111

We use the same but also have mark away. There's nothing worse than removing progressive lens markings on poly with alcohol...mark away works wonders and lasts forever.

Markaway is the lowest priced top class markings remover that also does not damage poly as some of the others can do.

see at:

►Click for full Details: http://optochemicals.com/products/info_markaway.htm

►OptiBoard Product review: Markaway Review

[For-Life]

I liked Chris's Markaway product. Found it worked way quicker than alternatives. I like quick things

[Didier]

Originally Posted by FVCCHRIS

In the last 2 years I have developed an extreme sensitivity to the stuff. The Ultra-Optics hard coat resin goes through my nitrile gloves and blisters my skin if I don't get the gloves off and wash right away.

Acetone pass throw nitrile, use good quality latex instead.

[Ori]

isn't acetone and alcohol bad for frames?

[Chris Ryser]

Originally Posted by Ori

isn't acetone and alcohol bad for frames?

Both of them are bad for many other things than just frames which they attack as well as your health.

Acetone is a good solvent for most plastics and synthetic fibres including those used in laboratory bottles made of polystyrene, polycarbonate and some types of polypropylene.[3] It is ideal for thinning fiberglass resin, cleaning fiberglass tools and dissolving two-part epoxies and superglue before hardening. It is used as a volatile component of some paints and varnishes. As a heavy-duty degreaser, it is useful in the preparation of metal prior to painting; it also thins polyester resins, vinyl and adhesives

Dangers
Acetone
Unconsciousness may result if exposure is extremely high (greater than 10000 ppm). Intolerable nose and throat irritation would also occur at these concentrations. Even higher concentrations can cause collapse, coma and death. Tolerance to the effects of acetone can develop. Tolerance means that, with repeated exposures, higher concentrations are required to produce symptoms which had previously been observed at lower concentrations. ...............................
http://www.entheology.org/tips-acetone/acetone.htm

Methanol, (alcohol)
Inhalation of methanol vapor is the most common route of occupational exposure. Poisonings have also resulted from absorption through the skin; although it is only a mild skin irritant, it can be absorbed through the skin in toxic amounts. Accidental swallowing is also possible.

As little as four milliliters can cause blindness and 80 to 150 milliliters can be fatal; about half a milliliter per kilogram of weight is deadly.
http://safety-council.org/workplace-safety/methanol/

[edKENdance]

We use methyl hydrate.