Chromaline Chroma blue users?????

[tonypep]

That would depend on the life of the bulb, and if you have an integrater. Remember we measure in light units not time.

[screenprintguy]

Tony is spot on yet again. Also, are you CTS, "no glass and draw down blanket", or through glass and drawdown? Is your unit self contained, or free standing wall style exposing? All of that factors in. There are a few other guys on the board here now using HXT for their water based prints using different types of exposure units. I've chatted with guys using HXT exposing normally through glass film and drawing down the blanket with 1,000 watt, 1,200 watt, and I think a guy with a Richmond who is probably using the 10k bulb. Contact your local CCI rep, or Robert Luca at CCI, they are very open to sending a sample for you to try. Dial in your times, trust me, once you get it right, you won't go back to anything else for WB printing. I know we won't it's flawless reliable every time emulsion when dialed in correctly.

[noortrd]

We already have hxt emuslion According to hxt data sheet  exposure time for 5 k  for 86 white mesh is 55 seconds  . Is that correct for water base and discharge wthout hardener?.  What about plastisol exposure time ?

[tonypep]

I would be concerned about an emulsion co listing exposure time in seconds without exposing with a step wedge test. They know darn well that there are outside influences such as those mentioned above that can affect the final outcome. On this subject you need to test yourself in real time using your equipment instead of just asking (if you want to get it right the first time). This is too important, no matter what ink or emulsion you use.

[noortrd]

different emulsion time difference between 20 second to 4 minutes. so we just idea for small time bracket.

[Frog]

I would be concerned about an emulsion co listing exposure time in seconds without exposing with a step wedge test. They know darn well that there are outside influences such as those mentioned above that can affect the final outcome. On this subject you need to test yourself in real time using your equipment instead of just asking (if you want to get it right the first time). This is too important, no matter what ink or emulsion you use.

Step Wedge Man says "Manufacturers' listed exposure times can be useful as comparisons within their line of emulsions, and of course, as starting points of a specific shop's tests.

All users of a new emulsion should be prepared to, and even expect to sacrifice at least one screen in the name of king and country (or owner and shop)"

[ScreenFoo]

Psssh, no way.  You want to plan on wasting at least a few screens if you want a good baseline... 

Not to say you can't use a step wedge on an athletic print, way overexpose it, and get an OK one color screen along with a good time for that mesh/stencil...

[noortrd]

so exposure time for plastisol is less than water base and discharge?. Any comment.

[tonypep]

A properly exposed screen is just that and independant of ink chemistry. That said we obviously have emulsions designed around ink chemistry and while many take extra steps for WB others do not.

[noortrd]

We checked hxt emulsion on 5 k light and 40 t around 100 mesh TIME 60 second. But failed all emuslion lie down through screen . We also checked chromablue and it expose in 30 second . Whats wrong with hxt ..