Mask fogging.

[spectrum]

Not overlays, but solid lenses.

For instance, SeaVision (http://www.seavisionusa.com/), make their corrective lenses out of plastic. Their web site says the lenses are "made from the highest quality materials (CR39) that are stronger, and more efficient than glass."

I just looked up CR39; Wikipedia says it's not polycarbonate, but "a plastic polymer commonly used in the manufacture of eyeglass lenses."

Plus the SeaVision web site says, "Please do not clean your SeaVision Mask with any abrasive substances (toothpaste, scrub cleansers) this will damage the anti-fog quality." I think what it'll actually do is scratch the lenses, and/or damage any coating they put on.

As an aside, weight does get to be an issue when the (glass) lenses are as thick as mine are, with a -9.5 correction. They make my mask quite negatively bouyant. I use a Marsoops neoprene strap that compensates for the negative bouyancy, making the whole mask pretty much neutral -- I figure if I lose it, it'll just hang there in front of me, and I'll at least see the lime-green strap to find it. Plus the strap turns inside-out to double as a soft padded case to protect the mask when I'm not using it -- not a minor point for me.

I went ahead and added a note regarding non glass lenses. Thanks.

Pete

 

[Paladin]

I scrubbed the mask three more times with toothpaste and did the cold water/warm breath test. It still fogged up. Then I tried Spectrum's Soft Scrub suggestion and when I did the cold water/warm breath test it stayed nice and clear. The Pacifica is my first ever silicone mask. All my other masks are neoprene. I suppose there is something different in the manufacturing process between the two types because I never had any problems with neoprene masks.

Anyway, thanks guys.

 

[Paladin]

That will not work on a mask that has manufacturing residue or has been contaminated with sunscreen, make-up or salad dressing. If it's working for you somebody cleaned the mask before you or you are diving in consistently very warm water. The mask must be cleaned to resist droplet formation and to promote sheeting.

Salad dressing? How in the world...?

 

[spectrum]

Salad dressing? How in the world...?

Applying defog for dive 2 during a surface interval lunch perhaps? Written as levity but still possible.

Pete

 

[spectrum]

I scrubbed the mask three more times with toothpaste and did the cold water/warm breath test. It still fogged up. Then I tried Spectrum's Soft Scrub suggestion and when I did the cold water/warm breath test it stayed nice and clear. The Pacifica is my first ever silicone mask. All my other masks are neoprene. I suppose there is something different in the manufacturing process between the two types because I never had any problems with neoprene masks.

Anyway, thanks guys.

Yes, the curing of the silicone has some ugly off gassing effects. Things may have changed over the years but another source of the film is the way the glass is floated during manufacturing.

 

[scubaskipper]

soft scrub 2 or 3 times, defog on DRY lens, no nose breathing

 

[fisheater]

Then, once you get the initial crap off of the lenses, keep them clean. I use the optician's cleaner and cloth.

 

[ff1diver]

For on a regular diving basis after you get the manufacturing film off use johnson's baby shampoo (its the best) put a little on the inside of the lenses, smear,let dry, then right before you put them on to take that giant stride rinse once, and do not take them off before you descend, if you do...you will need to apply organic spit...works every time.

 

[String]

Easiest way to stop it fogging is to heat the inside of the glass with a lighter than tooth paste off the black residue.

 

[Doc]

Toothpaste before every dive.

Never fogs, but always raises cries of indignation from the internet.