Help with St 28 with Crizal

[Mike Fretto]

We are looking for some help understanding why Crizal st 28's from one lab dont look like Crizal st28's from another lab. What we find is a nasty run in what appears to be front side SRC, looks like lenses are dip coated and cured with the seg line running vertically runs in coating always towards nasal. When questioned one lab (with runs) responds with the other lab (without runs) isnt giving us SRC. What is the procedure on Crizal ST28's

[DragonLensmanWV]

We are looking for some help understanding why Crizal st 28's from one lab dont look like Crizal st28's from another lab. What we find is a nasty run in what appears to be front side SRC, looks like lenses are dip coated and cured with the seg line running vertically runs in coating always towards nasal. When questioned one lab (with runs) responds with the other lab (without runs) isnt giving us SRC. What is the procedure on Crizal ST28's

Dunno about that exactly, but there has been a rash of poor Crizal coatings coming from one of the several coating centers.

[For-Life]

I would put my money on that they are getting the lenses and coating them. Different sources of lenses with different types of scratch coats on them

[Chris Ryser]

.....................appears to be front side SRC, looks like lenses are dip coated and cured with the seg line running vertically runs in coating always towards nasal.

According what I learned Essilor puts on their own secret made in Japan hard coat. On a straight top you will get a run off from the seg line which is directed to the nasal side when spinning the lens, where it is the least visible.

[Mike Fretto]

The problem were having is both labs are Essilor labs one gives us runs in the lens the other doesnt. Actually were told one labs sends Crizal to an Essilor lab ( Dallas ) the other is an Essilor lab Greensboro I wont say which has the problem :cheers:

[Chris Ryser]

The problem were having is both labs are Essilor labs one gives us runs in the lens the other doesnt. Actually were told one labs sends Crizal to an Essilor lab ( Dallas ) the other is an Essilor lab Greensboro I wont say which has the problem

According to post's by Pete Hanlin here on Optiboard, they strip the front coating and put their special coating on that is said to be much better for adhesion of AR coats than anything else on the market.

So I would assume that the lab that gives you a run off on a ST lens on the nasal side is doing what they should do and the lab that has no run off is cutting corners and leaves the original factory coating (which is a dip coat without run off) on the lens.

At that point you have to assume that you are not getting the Crizal quality the company promises with their best front hard coat that guarantees adhesion for all eternity.............:hammer:

You could ask them if any of the 2 labs uses a dip coat machine to apply the hard coat............if they spin coat you will get the run off

[Uncle Fester]

Our now "partner" Essilor lab told me when Alize came out it cannot be put on segmented lenses without this running effect and should only be put on Essilor products because of the propriatery hardcoat.

Could a lab possibly be putting another AR on your job and call (charge) it as Alize if it's not running?

I use Zeiss SET as a default AR for FT bifocals.

[Chris Ryser]

Could a lab possibly be putting another AR on your job and call (charge) it as Alize if it's not running?

........I rather suspect that the lab that has no runoff did not put the new hard coat on and made the AR over the factory coated hard coat.

[Lee Prewitt]

It is more about experience in my opinion. At iCoat, we do a dipped hardcoat for both Vivix and Stainless (Crizal and Alize competitors) and have been putting them on FT styles for years without any issues. If you want it done right on more lenses on a consistant basis, iCoat is the place to be. You can PM for more details such as turnaround and pricing. It will amaze you what an independant can do.

[nicko]

Lee, Lee, Lee....

Turning the Optiboard into a sales call. Have you no shame....

[Lee Prewitt]

Lee, Lee, Lee....

Turning the Optiboard into a sales call. Have you no shame....

nicko, you are just jealous that I beat you to it It was not my wholehearted attempt to pull a Chris but we do not have a problem with the drip issue so I was enthusiastically pointing that out:D

[Chris Ryser]

..........the drip issue so I was enthusiastically pointing that out..............
nicko, you are just jealous that I beat you to it

It was not my wholehearted attempt to pull a Chris but we do not have a problem with ...........

I feel honored there is a new term attributed to me on the whole wide internet " to pull a chris".

However you were right to "pull a Chris" if you believer that you have something to offer that the readers of a thread do not know or if you are the only one that has a solution to a problem that puzzles them. :cheers:

[Lee Prewitt]

Thank you Chris. I am glad that you are not offended. I try to keep the outright "sales" down to a minimum. Nicko and I are friends and competitors here in the NW. We were having some fun. You are right though Chris...iCoat does have a solution to a common problem in the high end AR sector when it comes to FT's.

[Chris Ryser]

You are right though Chris...iCoat does have a solution to a common problem in the high end AR sector when it comes to FT's.

Lee....................in the way of iCoat, I always had a lot of respect for that company and Jack Jew who helped me develop the first slick hydrophobic coating in 1987 and which was also the first AR coater to offer and sell such an animal at a time when nobody had even heard of such treatments.

These days we even make them with anti-fog and anti-stat which nobody else can offer..................sorry, just "pulled another chris"

[For-Life]

of course there is a difference between slick hydrophobic and oliphobic coatings.

[Chris Ryser]

of course there is a difference between slick hydrophobic and oliphobic coatings.

Actually there is NOT...........at least with the product I know best............only the applications may vary :bbg:

[For-Life]

Actually there is NOT...........at least with the product I know best............only the applications may vary :bbg:

exactly. I have been trying to tell you that for two years now