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Hello Erik, I do hope that this forum is broad enough to host ALL the information available, held by whatever view the person holds. A little of my background, - 6-year apprenticeship in an average UK Printing Company, not exactly at the forefront of printing technology, but I was lucky...

Hello turbotom, Thank you for the reply, yes SC is not a coated paper, why would it be considered so? What screen rulings were used on SC Paper? Regards, Alois

Hello Erik, I'm sorry if you think that - not so! BUT you do dismiss much of the Information I post and is posted by others that contribute to this forum, regarding the present topic under discussion - IMHO it is negligible the amount of ink saved by Wet on Wet 4...

Hello gentlemen and fellow Lithographers, There we have it, which I have assumed all along unless the Thesis and Presentations are not produced by Erik - they are FAKE . All that research done by FOGRA, Pira, and other leading organizations is not worth printing the PDFs !!!! and a waste...

Hello turbotom, I'm sure you would not be printing 150/170 lpi halftones on uncoated paper! - "Twin Forming is used as the "BASE Paper" for all coated papers be it LWC, MWC, WSOP, etc. during the many years I was in Web Offset after I transferred from Sheet-fed, I have printed on all...

Hello turbotom1052, I agree with your suggestions ---- BUT you need to update your knowledge regarding the Paper Making Processes, all modern paper making machines now days use Twin Forming which eliminates the Wire/Felt sides of the paper. Regards Alois

Hello mulo-g Don't let Erik lead you astray! ---- For your "Peace of Mind " just use the various Ink Useage Calculation Charts !!! Regards, Alois

Hello BigSi, Not my area of expertise (Digital), but I would suggest you use Offset Varnish /sealer - don't forget if you give the already printed sheets another pass YOU have already driven X amount of moisture out. Regards, Alois

Hello Steve, Great to see a Printing Project that involved your students, especially that there is a "Fundamental" lack of technical education in the USA - throughout what was "Blue Collar" manufacturing skills. Like most of those skills even in the UK/EU went to CHINA, apart...

Gentlemen, Re- Ink Costs The criteria used by many of the H/set printing companies I worked for in over 30 years - was the cost of Ink used of 1000 kg per million meters of paper and its printability. Regards, Alois

Gentlemen, Ink saving cost software - is not of primary concern in Heatset Web Offset, what is though is the Energy Costs used by the Dryer to be had by reducing IFT in the dense reproduction areas - by doing so it reduces costs. The gist of this conversation is saving money alone by Ink...

Hello, alibryan, Now I'm completely " LOST" !!!!!!! On 8 unit Long Perfector, we print 4 colours KCMY - then by the wonders of a sheet reversing mechanism -WE perfect the sheet by printing 4 more colours KCMY. Regards, Alois

Hello, sornchai and fellow Lithographers, Just suppose you had to back-up an already printed one-side sheet, why would you want to make a compensation curve just because it's already printed? In one sense you are "Perfecting" but NOT Printing both sides simultaneously! that could...

Gordo, Ergo as no idea of the what "Ink Saving" means regarding Ink Drying - 1) UV /EB Inks 2) Heatset/ Coldset 3) Oxidation Drying How can you save Ink if you are just printing Text/Solids and single colour halftones as individual KCMY! Regards Alois

Hello zamir, The only practical solution for you to try and reduce "Waviness" is to open and expose every book to a controlled - Room Temperature 20 C - 24 C - Relative Humidity 45% - 55% Even this gives no guarantee. Questions: 1) Was the "Waviness" seen before the Books were bound? 2)...

Hello cmitchprint, A brilliant video and a great credit to your restoration endeavors, looking forward to your next printing press restoration. Regards, Alois

Hello ar17, You need to be more "precise" about the print problem. Questions: Are you printing just "Solids"? 2) On what substrate - Paper/ Board? 3) Printing Method, Litho/Flexo? 4) If Litho why not use a "Higher Pigmented Ink"? 5) Why not have the customer "Pass" colour on the...

Gentlemen and fellow Lithographers, OK - so you have installed new rollers and reset the Roller Train - what next need be done? The new rollers need to be Primed, why because the Buna-N rubber compounds "Crave" printing ink vehicles so to prevent the rollers becoming "Embossed" before...

Gordo, Thank you for the Clarification regarding the "Dissertation from Clemson Uni. Regards, Alois

Hello DeltaE, An educated "guess" would be ---- Refraction of the Light via Laminate Film. Regards, Alois