Dot size for screen printing - T-Shirt Forums
 

Hi, Unregistered. | Today's Posts

T-Shirt Forums
User Name
Password

Register Today For Free!

Forgot Your Password?





Site Navigation








+   T-Shirt Forums > T-Shirt Industry Information > Screen Printing


Screen Printing Category Sponsor

Discuss the various aspects of screen printing. Inks, speciality printing, print locations, durability, etc.



Dot size for screen printing

 
Share This Thread Thread Tools
Old September 28th, 2010 Sep 28, 2010 9:25:24 PM -   #1 (permalink)
T-Shirt Lover
T-Shirt Fan

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Dot size for screen printing

Hi,

I am trying to find the size of a single dot (in micrones or any other unit) that comes from a fine screen (for tshirt printing).
I am not interested in LPI,DPI or halftones just to find out the dimensions of 1 dot.
Is there a table that shows it for different mesh counts?

Thanks
 
Sponsored Links
Advertisement
 
Old September 29th, 2010 Sep 29, 2010 8:47:09 AM -   #2 (permalink)
T-Shirt Lover
T-Shirt Fan

mrbadexample's Avatar
 
You can call me: Eric
Member Since: Jun 2009
Location: Tampa Florida
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 4 Times in 4 Posts


Default Re: Dot size for screen printing

Maybe I don't understand your question. The dots will be the same on any mesh. Are you interested in the size of dots at 10%, 15%, 20%, etc? Because LPI affects that, as well. And the dot will change depending on those percentages.

Can you clarify?
__________________
Eric Z Goodnight, Illustrator
http://www.ericzgoodnight.com http://tampa.designsbyrmr.com
 
Old September 29th, 2010 Sep 29, 2010 11:44:56 AM -   #3 (permalink)
TSF Veteran
Certified T-Shirt Junkie

PositiveDave's Avatar
 
You can call me: Dave
Member Since: Dec 2008
Location: Wessex
Posts: 4,870
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Thanks: 145
Thanked 707 Times in 624 Posts


Default Re: Dot size for screen printing

Generally you want your mesh (in inches) to be around 4.5x your lpi.
A 50lpi halftone has a cell size of 508microns, about half a millimetre.
A 50% 50lpi dot has a diameter of around 400 microns, assuming simple round dots (which no-one uses).
__________________
Positivity Ltd. UK Specialist in Screenprint Acetate Printing
 
 
Old September 29th, 2010 Sep 29, 2010 12:11:52 PM -   #4 (permalink)
T-Shirt Lover
T-Shirt Aficionado

CNClark's Avatar
 
You can call me: Chris
Member Since: Mar 2010
Location: Dallas, TX
Posts: 192
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 7
Thanked 57 Times in 45 Posts


Default Re: Dot size for screen printing

Are you asking for the dot size on the film. Or how large the opening is in between threads in the mesh? If it's the latter...all mesh companies will have a mesh opening table for each mesh count and thread diameter.
__________________
Chris Clark, www.dallasscreenprint.com
Contract Printing & Finishing Services
 
Old September 29th, 2010 Sep 29, 2010 4:57:18 PM -   #5 (permalink)
T-Shirt Lover
T-Shirt Fan
Thread Starter

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

Thanks all for the answers,

I will try to explain what I'm after:

The dot size is the diameter (dimensions) of the dot on the tshirt. That dot comes out from a single hole/opening in the mesh where no lines are formed only a single dot (if you put many dot you will get a line).

Think about a mesh that has only one hole/opening open and it can print a single dot only.

I am interested in the range of dot sizes that I can get such as from a 155, 230, 305 and 355 mesh.

Thanks
 
Old September 29th, 2010 Sep 29, 2010 5:33:25 PM -   #6 (permalink)
jsf
Senior Member
Certified T-Shirt Junkie


jsf's Avatar
 
You can call me: J
Member Since: Aug 2009
Location: Philippines
Posts: 2,901
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Thanks: 129
Thanked 468 Times in 376 Posts


Default Re: Dot size for screen printing

I am not sure what you are referring to, but here is a table in which a ratio is usually used to help in the selection process and can be calculated by dividing the mesh count by the line count (both numbers must be in either inches or centimeters).


(credits: Grafica Flextronica)


Or perhaps, you can read more about on mesh openings here: Pre-Press 3
__________________
Mag-print tayong lahat para masaya!
Works in here: https://www.t-shirtforums.com/members...-printing.html
 
Old September 29th, 2010 Sep 29, 2010 6:26:18 PM -   #7 (permalink)
T-Shirt Lover
T-Shirt Fan
Thread Starter

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

Thanks.

So what is the correlation between that and the dimensions of a dot on the garment?

I think I can ask it in another way:
What is the thinest line - a single line fron a single colour I can form from a 230, 305 and 355 mesh?

Thanks again
 
Old September 29th, 2010 Sep 29, 2010 6:46:38 PM -   #8 (permalink)
jsf
Senior Member
Certified T-Shirt Junkie


jsf's Avatar
 
You can call me: J
Member Since: Aug 2009
Location: Philippines
Posts: 2,901
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Thanks: 129
Thanked 468 Times in 376 Posts


Default Re: Dot size for screen printing

Quote:
Originally Posted by bigbang
Thanks.

So what is the correlation between that and the dimensions of a dot on the garment?

I think I can ask it in another way:
What is the thinest line - a single line fron a single colour I can form from a 230, 305 and 355 mesh?

Thanks again

As a procedure, halftone is a technique to make gradients. The smaller i gets the lighter it will print. In a non-technical answer to your question in my opinion is to do it right as long as you can do your halftones as finer as it gets... In screen printing sometimes you cannot be that static and specific.

We do some 30lpis on 100mesh count and even on a 120 mesh count, 40lpis to 50lpis can be applied on 150, 200, and 250, 55lpis to 70lpis are applied to 305s.

And in our experience the finer dots the better details you can get and the finer dot you can print the less moire effect is noticed. The best yet we have is 65lpi on 305s, doing 70lpis is very hard to perfect when it comes to washing but it is still achievable.
__________________
Mag-print tayong lahat para masaya!
Works in here: https://www.t-shirtforums.com/members...-printing.html
 
Old September 29th, 2010 Sep 29, 2010 6:51:59 PM -   #9 (permalink)
T-Shirt Lover
T-Shirt Fan
Thread Starter

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

So how many micrones is it: around 10-20, 40-50, 90-100 or 140-150?

I am looking for the finest line or dot.

Thanks
 
Old September 29th, 2010 Sep 29, 2010 7:19:35 PM -   #10 (permalink)
jsf
Senior Member
Certified T-Shirt Junkie


jsf's Avatar
 
You can call me: J
Member Since: Aug 2009
Location: Philippines
Posts: 2,901
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Thanks: 129
Thanked 468 Times in 376 Posts


Default Re: Dot size for screen printing

Quote:
Originally Posted by bigbang
So how many micrones is it: around 10-20, 40-50, 90-100 or 140-150?

I am looking for the finest line or dot.

Thanks
I am not sure how I can answer you... but if you have read the link from my previous post: Pre-Press 3, as stated:

8. Mesh opening
The dimensions of the mesh openings affect stencil support, meter ink flow and contribute to the print's appearance.


The best mesh for screen printing is commonly woven out of monofilament polyester and it functions both as support for the stencil and to meter the amount of ink deposited on the substrate. The dimensions of the mesh count, percentage of open area and thread thickness all contribute to the appearance of the end product. You will find that accurate measurements of these mesh specifications are supplied by the manufacturer. Poor image registration, image elongation and uneven ink deposits can result from the improper selection or preparation of the mesh fabric.

Mesh opening

As a general rule, the dimension of the mesh opening should be at least three times larger than the pigment fineness of the ink.
The mesh opening is measured with a microscope from the edge of one thread across the opening to the edge of the opposite thread, in microns (1 micron = 1 millionth of a meter, or 0.00003937"). High quality mesh is woven so the finished product offers a perfectly square opening, within tolerances. Since threads come in different diameters, you can have mesh openings that are the same in vastly different mesh counts. A fat thread in a low mesh count can have the same mesh opening as a thin thread in a higher mesh count. The threads will make the mesh thicknesses different.

Percentage of open area

Percentage of open area (POA) is more useful when calculating ink consumption. The percentage of open area, or aperture percentage, refers to the relationship between the thread area and the actual opening between four woven threads in the mesh. The open mesh area helps determine the ability of an ink to pass through the mesh, as well as the thickness of the ink deposit in the printed image.
Textile printers don't use percentage of open area as much as those who print non-absorbent substrates such as glass, plastic or metal. The absorbent nature of our substrates provides great latitude, so the subtleties of choosing a mesh based on POA are not as significant.
__________________
Mag-print tayong lahat para masaya!
Works in here: https://www.t-shirtforums.com/members...-printing.html
 
Old September 29th, 2010 Sep 29, 2010 7:26:55 PM -   #11 (permalink)
jsf
Senior Member
Certified T-Shirt Junkie


jsf's Avatar
 
You can call me: J
Member Since: Aug 2009
Location: Philippines
Posts: 2,901
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Thanks: 129
Thanked 468 Times in 376 Posts


Default Re: Dot size for screen printing

Now even if you actually knew on how many microns(if this will make you feel comfortable instead of using LPIs) you really wanted to print on... I mean is that really makes a great deal of relevance?

Why not just give it a try making 100lpi (very fine dots) halftone on a 355 or a 70lpi on 305... Now the question is can you do it successfully from exposure to printing? (Hmmmmmm, I difinitely doubt it )
__________________
Mag-print tayong lahat para masaya!
Works in here: https://www.t-shirtforums.com/members...-printing.html
 
Old September 29th, 2010 Sep 29, 2010 7:43:29 PM -   #12 (permalink)
T-Shirt Lover
T-Shirt Fan
Thread Starter

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

Thanks again for the answers.

This I what I am talking abot: The dimensions of the fine dots (100lpi (very fine dots) halftone on a 355 or a 70lpi on 305) on the tshirt or the smallest spot in microns I can get from the screen.

100lpi (very fine dots) halftone on a 355 or a 70lpi on 305: What is the thickness of the line in microns or inches?

Whre can I find this information?

I know digital printers have a very small drop diameter (on the tshirt) but each printhead has a different one.
 
Old September 29th, 2010 Sep 29, 2010 7:53:15 PM -   #13 (permalink)
jsf
Senior Member
Certified T-Shirt Junkie


jsf's Avatar
 
You can call me: J
Member Since: Aug 2009
Location: Philippines
Posts: 2,901
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Thanks: 129
Thanked 468 Times in 376 Posts


Default Re: Dot size for screen printing

Quote:
Originally Posted by bigbang
Thanks again for the answers.

This I what I am talking abot: The dimensions of the fine dots (100lpi (very fine dots) halftone on a 355 or a 70lpi on 305) on the tshirt or the smallest spot in microns I can get from the screen.

100lpi (very fine dots) halftone on a 355 or a 70lpi on 305: What is the thickness of the line in microns or inches?

Whre can I find this information?

I know digital printers have a very small drop diameter (on the tshirt) but each printhead has a different one.
Here's a sample of a separation, embedded it in Corel... print this on laser and on a plain paper or vellum. It contains a 65lpi, 85lpi, and 100lpi halftones.

See if it does answer your query... Goodluck.

MEGAUPLOAD - The leading online storage and file delivery service
__________________
Mag-print tayong lahat para masaya!
Works in here: https://www.t-shirtforums.com/members...-printing.html
 
Old September 29th, 2010 Sep 29, 2010 7:54:01 PM -   #14 (permalink)
T-Shirt Lover
T-Shirt Fan
Thread Starter

bigbang's Avatar
 
Member Since: Mar 2010
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

Thanks,
It is important as I need to compare it to digital printing. I am not a screen printer yet so I dont know what 100pli is. I sit 100 lines per inch so each line is theoretically 1 inch divided by 100? Is a line made of a row of single openings? I just need to know the range of dimensions of dots/lines from different mesh.
 
Old November 5th, 2015 Nov 5, 2015 6:29:05 PM -   #15 (permalink)
Forum Member
Be nice, this is my first post :)

URUMEX's Avatar
 
Member Since: Nov 2015
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 0 Times in 0 Posts


Default Re: Dot size for screen printing

Hi, I am trying to print on pvc film font sizes 0.2 mm. Anyone knows how to do it?
 






This is a discussion about Dot size for screen printing that was posted in the Screen Printing section of the forums.

Quick Reply
Type Your Message Below:
Do NOT Post Self Promotional URLs, Advertisements, Sales Offers or Requests. It is against our Forum Guidelines.
Options

Register Now

In order to be able to post messages on the T-Shirt Forums, you must first register.


Please enter your desired user name, your email address and other required details in the form below.

Your username must be between 2 and 16 characters and contain only letters and numbers (no special characters like hyphens, *, ', ~, etc)
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

A confirmation email will be sent to this address, so please make sure it is accurate and that your email software is set to allow emails from our domain: t-shirtforums.com (sometimes the confirmation email gets accidently filtered into Yahoo/AOL/Hotmail/Gmail spam folders)
.

You won't be able to post until your email address has been confirmed. We take your privacy very seriously. Feel free to review our Privacy Policy in a new window.
Email Address:
First Name
It's nice to be able to be on a "first name" basis with the people you talk to in a forum. This is a totally optional field; if you like being on a first name basis, please enter your first name below :)

Log-in


Thread Tools

Posting Rules

Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
screen size vs actual print size? amnesia Screen Printing Equipment 12 October 2nd, 2010 02:58 AM
Question about screen printing and size - same design size for different size garments? MrEzzy Screen Printing 15 February 17th, 2010 11:52 AM
different size shirt require different size screen? jhende Screen Printing 2 August 22nd, 2009 08:56 PM
Screen printed label without Tee size + hangtag with Tee size skekiman T-Shirt Tag Relabeling and Finishing 13 June 8th, 2008 08:28 PM
Real size of screen printing screens streamland Screen Printing 6 October 26th, 2007 05:06 AM


All times are GMT -8. The time now is 10:15 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright 2004-2014 T-ShirtForums.com. All rights reserved.