Inline Varnish vs a seperate pass

[bmike]

I am curious of the pros and cons of inline varnishing and are there any tips on running it.
Tacks etc. We usually let it dry and then flood but time is a factor. Any advice is appreciated.

 

[nhprinter]

The biggest difference I find is that with an inline varnish it will soak into the ink somewhat so you won't get quite as high of a gloss or quite as dull of a dull than if you ran it offline after the ink had time to dry.

Another factor might be the drying time. With an inline varnish you won't be able to back up the job right away and might have to pull the job rather than just throw a varnish on it the next day.

There have been jobs that I've run the first side without varnish and the second side with an inline varnish and just put the varnish on the other side the next day. This would only work if there was little ink coverage because of the visual difference I stated above, but it might help if time is a factor.

As far as tips on running it.......Overprint varnish is designed to do just that......overprint. It's already been adjusted to be last down so there's nothing to do to any of your inks unless you have one that is a very low tack.

Just don't makeready with your varnish on. Wait until you're ready to go and then make sure you have plenty of varnish on the rollers or it will tack up and you'll pull the colors you're overprinting into the varnish. You can usually run the same amount of varnish as you do when you run it offline.

Hope this helps,
Dave

 

[Freeman A.Gain]

Inline varnishing - can you say " Gas ghosting!" major con. Racking the job, major con. One pass, either side, major pro. Quality versus speed... you decide.

 

[nhprinter]

Inline varnishing - can you say " Gas ghosting!" major con. Racking the job, major con. One pass, either side, major pro. Quality versus speed... you decide.

Running an inline varnish has absolutely no relation to gas ghosting or whether or not you have to rack the job. We do both on a regular basis and the only difference is what I stated in my reply.

 

[CFPrinting]

Running an inline varnish has absolutely no relation to gas ghosting or whether or not you have to rack the job. We do both on a regular basis and the only difference is what I stated in my reply.

If the varnish is a spot, then you will have to be concerned about ghosting.

 

[nhprinter]

If the varnish is a spot, then you will have to be concerned about ghosting.

I'm sure different shops have different problems, but gas ghosting hasn't been a problem for us for years. If anyone is having problems they should take a look at there ink company. There are inks out there that won't gas ghost.

With that said......the original question was for a flood varnish, not a spot varnish, but ghosting is caused by the ink not the varnish. So whether or not you run it inline or offline it makes no difference.

 

[jebuxx]

Funny, I did this all the time with stellar results. I even used to flood varnish on perfecting with an MO. Then I supervised a print shop here in Minnesota and the press ops never did it for some of the same reasons mentioned here. The trick is the varnish needs to have a very loose tack. If the varnish starts to pick up a color from the other units it either needs - A needs more varnish applied or B needs to have the tack reduced more. Remember viscosity and tack are two different issues. I used boiled linseed oil for this. The oil also helped promote drying. Next do not use water. Dry flood varnish and the gloss will blind you.
Another trick at the delivery to help prevent blocking is powder, IR drying and turn off the juggers and wedge the corners. Works every time. Try using a Kohl Madden varnish call Scotty's hard dri.
Good luck

 

[Eyal Gragir]

a different approach to varnishing

a different approach to varnishing

there is an israeli company that is working on non impact(inkjet) sheet to sheet varnishing machines, full flud or spot. worth considering as a long term solution. Scodix is the name, look them up on the web or ask me for contact if you are interested.
eyal g.

 

[billy gold coast]

2nd pass is a con to charge clients more results vary little

 

[GazKL440]

2nd pass is a con to charge clients more results vary little

yeah agreed unless you have only a 4 col and you have to double it thru, otherwise its a time waste and higher chance of marking etc..

 

[Elbertjolley]

We just bought a Scodix and it is a very cool machine. We are in Greenville, NC the name of our company is AccuLink. There is an overprint varnish that works really well that is called Kentucky Shine that dries fast and doesn't ghost nearly as bad as regular varnish. Hope this helps

 

[SHELBY]

The biggest difference I find is that with an inline varnish it will soak into the ink somewhat so you won't get quite as high of a gloss or quite as dull of a dull than if you ran it offline after the ink had time to dry.

Another factor might be the drying time. With an inline varnish you won't be able to back up the job right away and might have to pull the job rather than just throw a varnish on it the next day.

There have been jobs that I've run the first side without varnish and the second side with an inline varnish and just put the varnish on the other side the next day. This would only work if there was little ink coverage because of the visual difference I stated above, but it might help if time is a factor.

As far as tips on running it.......Overprint varnish is designed to do just that......overprint. It's already been adjusted to be last down so there's nothing to do to any of your inks unless you have one that is a very low tack.

Just don't makeready with your varnish on. Wait until you're ready to go and then make sure you have plenty of varnish on the rollers or it will tack up and you'll pull the colors you're overprinting into the varnish. You can usually run the same amount of varnish as you do when you run it offline.

Hope this helps,
Dave

This is one heck of funny thread gas ghosting, I call chemical ghost, but whatever!
I agree with you Dave all great points and 100% correct! I could not of said it better lol.