UV coating over Digital?

[Freeman A.Gain]

Has anyone done offline UV coating, offset, over top of print that has been done digitally?

[maynardsayswhat]

TecLighting has a UV mix that coats many digital copier outputs. It's what I use for my KM6500 sheets.

[mglouis]

We've coated DC5000 and iGen4 prints without problem.

Matt

[Freeman A.Gain]

Not sure which machine it'll be coming off of, but probably the iGen or Nexpress. What is the fusion oils? Just asking because I'm sure once I've attempted this and succeeded, the sales dept will want to try more! Lol!

[hondarr9]

We have a Graphic Wizard UV coater. I have only been successful coating prints from 1 out of our 3 digital machines and another shops prints from an HP Indigo. We have a KM 5200 and Xerox 252 that I cannot coat. Our Xerox 700 coats no problem. We are using the "digital coating". Graphic Wizard did come in to our shop to look at our machine, and told me we needed another uv lamp (600w) in addition to the one already in place (300w). The machine already had the proper wiring and receptacle in place. Had the new bulb installed last week and my first test prints from the KM were no better than before. Back to square one I guess So I guess my answer to you is it depends on what coater you get and what specific machines you will be using. I recommend that you send lots of samples from all of your machines to be coated before buying anything.

[maynardsayswhat]

Oil fuser machines require a different coating material than the high-temp toner counterparts. Be sure to use the one formulated to the substrate.

I'm not sold on the additional lamp idea =) If anything that might over-cure it, no?

For the record we're using TEC coating 2709 for our KM 6500 and it works well for our needs.

[KPetrochko]

We OFTEN UV coat offline within minutes of printing on our IGEN 3. Fuser oils and all. They say to wait 72 hours for most finishing operations (esp. binding) for the oil to 'dissipate', but we use a quality Kelstar coating in an FMA coater with excellent results.

[michealtorn]

Yes we have printed UV on Digital Printing without any problem

[teclighting]

The first step is to determine what type of Digital output you are dealing with. While coating there are three to consider. 1. Digital ink (HP Indigo) 2. Toner (Xerox & Ricoh) 3. Wax based toner (Konica & Canon). The first two should be quite simple to coat with most UV coaters and a quality digital UV fluid. If the first two are problematic 98% of the time it can be solved with a different coating. The third tends to be the challenge. The challenge is due to the wax in the toner repelling the coating. This can be overcome by changing the surface tension of the toner with the introduction of heat (IR lamps prior to the curing of the coating). You must also use a UV coating specifically designed with high flow, high adhesion characteristics. Many times it is misdiagnosed as poor curing. It is simply a bonding issue that a more powerful UV lamp can not fix.

Tec Lighting offers both UV coaters and the coating that are guaranteed to work with any digital output.

Hondrra9, i have a UV coating that may help you run KM.

Please excuse my simplistic approach to the different types of ink and toner, i'm sure its more complex however not in regards to applying coating.

Daniel
714-529-5068

[davek44@earthlink.net]

We have no problems UV coating output from our Xerox DC-7000 & DC-252. We have a TecLighting unit & use their recommended material. Finished product looks terrific.

Dave