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Hi, I have just printed a job using UV thermochromic varnish which turns blue when the packaging is placed in a refrigerator. We found that if the job has to run in 2 passes as this one did, 9 colours, it was best to print the varnish last, also it piled on the blanket requiring many blanket...

Hi, I have just printed a job using UV thermochromic varnish which turns blue when the packaging is placed in a refrigerator. We found that if the job has to run in 2 passes as this one did, 9 colours, it was best to print the varnish last, also it piled on the blanket requiring many blanket...

@ Junker......I am puzzled by this as well, I would also think that the cause was excessive resistance, but the rollers are meticulously set and regularly checked so I would be surprised if there was any excess friction, and as far as I know UV ink only cures when is it lamped so that would not...

Hi Junker.....thanks for your input, the rollers are in pretty good condition, all rubbers are replaced once a year and set properly as per the manual, and I can't see any sign of wear although it is hard to tell because everything is covered in oil, one thing that does happen is the...

Original Heidelberg parts and plenty of oil.

After about the 12th time of this occurring in the last 18 months, I thought I would ask around to see if anyone else has had the same problem or is it just me!! Running a CD102 7 colour 1998 model, and the oscillation on all units keeps failing, the bolt that attaches the arm from the cam to...

I am thinking it is time for a career change, maybe buy a broom and become a cleaner!!

Just been for an interview for a vacancy running a 6 colour 102CD with coater, small company just the one press, but the rate on offer really surprised me, the press is operated by one man, no assistant, the shift pattern is triple rotating shifts, and the rate is £12 per hour, if you take off...

Hi Everyone, has anyone out there ever replaced the gripper opening cam on the chain delivery gripper bar on a 102, I think the press is a 1997 model, looking at the parts book and the press itself it looks like it could be a bit tricky, can anyone help?

I work in the packaging sector right now, and most of what we print is UV varnished, foiled and embossed, diecut, window patched, then glued, I would love to know how all this is going to be tagged on the front of a production line??

Hello fellow pressmen, I was wondering if there is a definitive order when printing for instance 873 or 877 type reversed out of a black, or other dark coloured solid, should there be a spread on the type with the black net fit printed after, or should it be the other way round, ie the black...

It is called an exothermic reaction and I have seen exactly the same thing, no heat at all in the drying process, came in the next morning to find the stack red hot and the ink, which was an overall solid of light blue changed colour to light green, if I had not seen it with my own eyes I...

Hello fellow pressguys, Does anyone out there know what the UV function on the Heidelberg cp tronic actually does, it is there alongside the waterless function, what does it change if anything, I am curious because the press seems to run better with UV inks in conventional mode with the varios...

hello everyone, I have just started a new job running a 102 using uv inks and printing on plastics and foils with low migration inks, I am having a lot of bother with excess water on the press, no where for it to go right, anyway I enquired about turning on the linear fans that blow on the...

Hi everyone, having some issues with picking on the tail edge of solids and type etc on blankets, but only on one kind of stock, 100gsm matt text, all other stocks are fine but this one is really bad, so bad that is almost dents the blankets. The press is a 4 col Ryobi and the inks we use are...

Hi there, I ran a 12 col speedo a few years back that had 2 units that could be converted to run coating using the Tresu modular system, my experiences were, really long set up, about 3 hours if using both units, a long time to convert the press back to printing only mode, and on top of this the...

I think this thread is going slightly off topic, I am still wondering if anyone else has the same problem of scumming as mentioned by the topic starter....pleeease, I am dying to know why this happens!!!!

I am not sure if it would be gas ghosting if you are using aqueous coating, that is highly unusual, coating a job almost always eliminates ghosting, it sounds to me like the sheet is being distorted by the action of the ink drying. the only solution I could suggest is to use a heavier stock, or...

Well I have been getting this problem for about a year now on a 6 col 105XL, it seems to me to be a chemistry problem perhaps linked to the conductivity, it doesn't make sense though as there should be an excess of water down the edges of the plate where there is no paper, hence in the old days...

There is a test form that you can use to set press curves, I did it last year with a Heidelberg demonstrator, perhaps you can ask about this.