Screen Print Terminology

[Ryan]

Because I'm an idiot, anyone that really knows want to explain some of the terminoligy and what it actually means in layman terms? with ink, short bodied, medium bodied etc. What it means for the ink, why you would want one vs another? What the elongation of a mesh actually determines? Anything else that you know and want to share??? Those just happen to be the 2 on my mind and I couldn't tell you why any of it makes any difference. Wonder how I've been in this business as long as I have 

[Sbrem]

short body, think Cool Whip... throw it on top a piece of pie, and it just sits there; after that, it gets thinner then actually runny (longer body). If on the mesh you mean low-elongation, once upon a time, mesh would lose it's tension just sitting there (still does but not as much) It stays tight because it's memory is trying to convert to slack. However, some meshes lose their memory, and therefore tension. (so, retensionable frames help solve this). Low-elongation mesh has a better memory, holds it's tension longer. That's my simple take on it anyway, hope it helps.

Steve

[blue moon]

long body is like taffy, you can pull it and it will not break as easily. Think stringy!

short body, as Steve pointed out, breaks when pulled.

that's the way I think of it. There is more to the story as the properties change under pressure, but that's the gist of it.

pierre

[blue moon]

also, it would be nice to have a terminology/dictionary available somewhere on the web site. Any takers on writing it up?


pierre

[3Deep]

From shop to shop region to region everyone is going to have some term they use, but it all points back to the same thing.  I think that's why we all give different answers to the same question, but have the same results, to get some of the best terminology would be Scott Fresners book " how to print T-shirts for fun & Profit"...Collin on the boards here was in the ink biz I bet he is full of info on the terms of ink.  The two guys that posted above I don't know about them jokers LOL gave you some good info, me I'm  Learning from them.......

Darryl

[tonypep]

How about thixotropic?

[tonypep]

Or metamerism?

[blue moon]

How about thixotropic?

see post number three for not going into thixotropic! But feel free to explain for the sake of the dictionary collection.

pierre

[blue moon]

Or metamerism?

huh, have I had my behind kicked by it!

pierre

[Printficient]

or cross link. or bridging. 

[tonypep]

Thixotropic is the poperty of an ink or gel to reduce viscosity when sheared. Metamerism is the property of colors to change hue when viewed under different light sources or surronded by different colors

[ScreenFoo]

Hey wait a minute now Tony, if my white ink is "thixotropic" AND exhibits "dilatant flow", which term wins?   

[mraph]

Screen Foo

the terms are opposite  of each other

Thixotropic  is the false body of plastisols , think  getting thicker by sitting and as it is stirred or sheared it becomes more creamy less viscos

Dilatant flow..is the opposite, its when ..the more you stir something and it gets thicker .. the more shear force
usually not a problem with Plastisol.

[Ryan]

So who is making the list? I feel like I just read through a science book and went.....uh I need to drop a level because there isn't any way i'm going to pass the test 

[Zelko-4-EVA]

http://en.wikipedia.org/wiki/Dilatant

http://en.wikipedia.org/wiki/Thixotropic

http://en.wikipedia.org/wiki/Metamerism_(color)


not exactly laymans terms - unless you have studied the sciences.

maybe a wikipedia for screenprinters is needed - has anybody here created a wiki before?