User login

Predicting and Managing Dot Gain

(December 2011) posted on Wed Jan 11, 2012

The advice shared here will help you anticipate the dot gain you’ll experience in your garment-printing work and minimize its ne


By Screen Printing's Solution Sourcebook

click an image below to view slideshow

Art
The best way to adjust dot gain visually in Adobe Photoshop depends on your color-separation method. One of the easiest ways is to load each separation selection into an individual alpha channel with the layer options tuned to echo each ink color (Figure 3). You then can view the channels and overlay them onto each other to see how they’ll interact. This doesn’t give you a true example of the final print, because of the opacity and the interplay of the hue shifts that may occur, but it can come close enough to catch any major problems.

After you load a separation set into channels, you can adjust and view the dot gain that is likely to occur by opening each channel and then using Photoshop’s curves menu. You want to push the midtone of the curve diagonally toward the black point of the menu. This will cause the image to get darker and lose tonal range quickly as the values start to flatten and lose division between levels of brightness. Watch for a visible change in tonal value that approximates what you see in your test prints and the effect that this tonal shift has on your image’s clarity. The example in Figure 4 shows the extreme level of dot gain that may occur by pushing the curves menu too far. Lightening the value of the underbase reveals how the image can be damaged.

The lessons that you learn from these curves adjustments should affirm the results you saw on your test prints. You can expect value increases throughout your separation set that are similar to what you saw with your test file. If you desire an even higher level of precision in determining levels of likely dot gain, you can record the input and output levels of the adjustment curve after you adjust your original test file to echo the printed sample as closely as possible. Then you could save this curve adjustment in the curves menu and load it when you wish to adjust a separation channel that has the same halftone line count, uses the same ink, and will be printed on the same garment type as the test sample. This method should provide you with a very predicable adjustment tool for standard dot gain using a controlled set of variables.


Terms:

Comments

cco says: Gucci Gucci Bags Outlet is the biggest-selling Italian brand.Will the Gucci Bags 2012 hobo be making a comeback for spring? If Gucci has anything to say about it, the answer is “yes.” Gucci Men AND ...

Gucci Gucci Bags Outlet is the biggest-selling Italian brand.Will the Gucci Bags 2012 hobo be making a comeback for spring? If Gucci has anything to say about it, the answer is “yes.” Gucci Men AND Ladylike satchels and small crossbody bags have been the currency of the accessories industry for the past several seasons, so much so that Gucci Spring 2012's Gucci Sunglasses 2012 stable of chain-strapped hobos was more than a little surprising to see.Brand New Gucci Shoes Sale!2011 Style gucci outlet,60% OFF.

posted on: Fri, 04/27/2012 - 10:37pm
cco says: Iconic le créateur de Louboutin Homme traite son prodigieux succès remporté par ses semelles rouges signature avec magnanimité impressionnante.Christian Louboutin Mais le designer fran?ais a vu rouge,lorsque ...

Iconic le créateur de Louboutin Homme traite son prodigieux succès remporté par ses semelles rouges signature avec magnanimité impressionnante.Christian Louboutin Mais le designer fran?ais a vu rouge,lorsque le géant Yves Saint Laurent aurait posé le pied sur la pointe des pieds par le déploiement de son propre ensemble de rouge à fond les talons.
Gucci a leurs rubans rouges et verts, et je ne prendrais pas ce ruban et de le mettre dans mes Louboutin Femme. Pourquoi? Parce que j'ai un certain respect ", a déclaré Chaussures Louboutin, dont les réalisations ont porté sur les talons de Hollywood A-Listers y compris Blake Lively, Sarah Jessica Parker et Scarlett Johannsson.

posted on: Fri, 04/27/2012 - 10:56pm
cco says: What se Borsa Gucci Replica lo Gucci Outlet rendono possibile per voi per permettersi un aspetto elegante,stile di vita di una principessa.Gucci Sito Ufficiale Replica Conservare Online!Le sono perfetti ...

What se Borsa Gucci Replica lo Gucci Outlet rendono possibile per voi per permettersi un aspetto elegante,stile di vita di una principessa.Gucci Sito Ufficiale Replica Conservare Online!Le sono perfetti l'ultimo accessorio per ogni vestito.Borse Gucci Se siete stati a morire proprio quella borsetta di lusso o in borsa progettista,Scegli aspetto moderno replica per un assaggio,un'esperienza,un lifestyle.Gucci Borse ora è possibile trovare offerte incredibili sugli accessori di marca Gucci Borse Outlet a prezzi scontati fino al 70% al dettaglio.

posted on: Fri, 04/27/2012 - 11:13pm

Did you enjoy this article? Click here to subscribe to the magazine.