Calculating Exposure Time - Page 2 - 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 News and Articles > T-Shirt Articles
T-Shirt Articles, Interviews, How-To Instructions and Reviews covering a variety of subjects related to t-shirts.



Calculating Exposure Time

Like Tree1Likes

 
Share This Thread Article Tools
Old January 11th, 2010 Jan 11, 2010 1:35:38 PM -  
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 Calculating Exposure Time

It's easy to determine the optimum exposure time for a system even if you don't have an exposure calculator such as the Stouffer strip. Commercial exposure calculators are neutral density filters that allow specific percentages of the light to pass through so that you get a...
__________________
Positivity Ltd. UK Specialist in Screenprint Acetate Printing
 
The Following User Says Thank You to PositiveDave For This Useful Post:
Sponsored Links
Advertisement
 
Old April 29th, 2010 Apr 29, 2010 6:57:07 PM -   #15 (permalink)
Forum Member
T-Shirt Apprentice

norbac's Avatar
 
You can call me: tonight
Member Since: Jun 2009
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 0 Times in 0 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by red514
true but the test strip isn't very big and is easily covered with a piece of wide masking tape. I haven't experienced this yet but from what i've been reading regarding exposure units, the lamps will degrade over time. i don't think it's that important to use the strips on every screen but at least 1 screen a day. If you do run into issues then use it on every screen until the issue is resolved. I feel these test make a big difference when dealing with fine detail and high mesh counts, for those types of jobs i'd like the strips to be used on every screen.
Ok, newbie here. So let's say I used a Stouffer or an Autotype calculator, obviously I need to rinse it to see how it washes out. Now my question is, should I just "dry" the rest with a towel or "something", and it will be ready to expose with the art and print right away?, obviously just covering it with tape like you said.

I'd appreciate any advice on the right procedure and or steps, and if possible a good place to get the calculators.
 
Sponsored Links
Advertisement
 
Old April 30th, 2010 Apr 30, 2010 3:47:19 AM -   #16 (permalink)
Super Moderator
Certified T-Shirt Junkie

splathead's Avatar  - this member was voted Most Helpful Member during our Annual August Member Appreciation Month
 
You can call me: Joe
Member Since: Dec 2005
Location: San Antonio
Posts: 13,849
Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Thanks: 280
Thanked 2,552 Times in 2,269 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by norbac
Ok, newbie here. So let's say I used a Stouffer or an Autotype calculator, obviously I need to rinse it to see how it washes out. Now my question is, should I just "dry" the rest with a towel or "something", and it will be ready to expose with the art and print right away?, obviously just covering it with tape like you said.

I'd appreciate any advice on the right procedure and or steps, and if possible a good place to get the calculators.
Pat dry with paper towel. Don't rub. Pay special attention to the image. Make sure there is no water film left in the screen. Then let it sit until completely dry. I usually allow about an hour.

The tests can usually be purchased from the same place you buy your screens or emulsion.
__________________
Joe
www.splathead.com
 
Old May 4th, 2010 May 4, 2010 10:53:07 AM -   #17 (permalink)
Forum Member
T-Shirt Apprentice

norbac's Avatar
 
You can call me: tonight
Member Since: Jun 2009
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 0 Times in 0 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by splathead
Pat dry with paper towel. Don't rub. Pay special attention to the image. Make sure there is no water film left in the screen. Then let it sit until completely dry. I usually allow about an hour.

The tests can usually be purchased from the same place you buy your screens or emulsion.

Thanks a lot Splat.
When you say, "pay special attention to the image" what do you mean?.

Just to make sure, the screen I run the test on, is later used for my printing right?. Obviously following your instructions to dry it, and then covering the test results with tape.
 
Old May 4th, 2010 May 4, 2010 3:11:23 PM -   #18 (permalink)
Super Moderator
Certified T-Shirt Junkie

splathead's Avatar  - this member was voted Most Helpful Member during our Annual August Member Appreciation Month
 
You can call me: Joe
Member Since: Dec 2005
Location: San Antonio
Posts: 13,849
Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Thanks: 280
Thanked 2,552 Times in 2,269 Posts


Default Re: Calculating Exposure Time

I mean not to let water dry in the image area. It could be mixed with dissolved emulsion and cause your image to not be as sharp. When you are patting the image down with paper towel, make sure no water whatsoever is left in the image area.

The test strips are placed in a corner of the screen. You would tape them off prior to printing.
__________________
Joe
www.splathead.com
 
 
Old May 4th, 2010 May 4, 2010 8:15:26 PM -   #19 (permalink)
Forum Member
T-Shirt Apprentice

norbac's Avatar
 
You can call me: tonight
Member Since: Jun 2009
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 0 Times in 0 Posts


Default Re: Calculating Exposure Time

Thanks again Splat, your help is much appreciated.
 
Old September 25th, 2010 Sep 25, 2010 8:10:04 PM -   #20 (permalink)
dd2
T-Shirt Lover
T-Shirt Aficionado

dd2's Avatar
 
You can call me: Don
Member Since: Sep 2010
Posts: 171
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 14 Times in 14 Posts


Default Re: Calculating Exposure Time

I wish I would have read the posting on the step test before I tried exposing film for three days..... did the step test and the first try on my logo came out perfect. This forum site is the best!! Thanks.
 
Old February 24th, 2011 Feb 24, 2011 8:29:30 AM -   #21 (permalink)
TSF Veteran
Certified T-Shirt Junkie
Thread Starter

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: Calculating Exposure Time

Quote:
Originally Posted by dd2
I wish I would have read the posting on the step test before I tried exposing film for three days....
Exposing for three days is almost certainly too much :-)
__________________
Positivity Ltd. UK Specialist in Screenprint Acetate Printing
 
Old June 16th, 2012 Jun 16, 2012 7:06:08 PM -   #22 (permalink)
T-Shirt Lover
T-Shirt Aficionado

Yasirm86's Avatar
 
You can call me: Yasir
Member Since: Jan 2012
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 2 Times in 2 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by PositiveDave
I got corked along the line :-)
hey i know im a bit late but i have a question...when i expose 1-8..starting at 1 minute and exposing each slot for 1 minute after that..im in the middle of doing it now and realized that when i expose 1 i do it for one minute and then move to the 2nd block and so on the 1st block will have been for a total of 8 mins or 36 mins?? highly confused!
 
Old June 16th, 2012 Jun 16, 2012 7:25:48 PM -   #23 (permalink)
dd2
T-Shirt Lover
T-Shirt Aficionado

dd2's Avatar
 
You can call me: Don
Member Since: Sep 2010
Posts: 171
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 14 Times in 14 Posts


Default Re: Calculating Exposure Time

8 minutes...
 
Old June 16th, 2012 Jun 16, 2012 7:50:43 PM -   #24 (permalink)
T-Shirt Lover
T-Shirt Aficionado

Yasirm86's Avatar
 
You can call me: Yasir
Member Since: Jan 2012
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 2 Times in 2 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by dd2
8 minutes...
I think I did it wrong lol I did 1 minute and then 2 minutes 3 minutes not 1 and then moved the bored and 1 moved the board lol
 
Old June 16th, 2012 Jun 16, 2012 7:57:20 PM -   #25 (permalink)
dd2
T-Shirt Lover
T-Shirt Aficionado

dd2's Avatar
 
You can call me: Don
Member Since: Sep 2010
Posts: 171
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 14 Times in 14 Posts


Default Re: Calculating Exposure Time

Yes, just move the board in 1 minute increments, so if you move it 8 times, your first section would have been exposed for 9 minutes. Good luck.
 
Old June 16th, 2012 Jun 16, 2012 8:03:05 PM -   #26 (permalink)
T-Shirt Lover
T-Shirt Aficionado

Yasirm86's Avatar
 
You can call me: Yasir
Member Since: Jan 2012
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 2 Times in 2 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by dd2
Yes, just move the board in 1 minute increments, so if you move it 8 times, your first section would have been exposed for 9 minutes. Good luck.
It would be 9 minutes?? How did you get 9 I thought it would be 8 if I have 8 blocks
 
Old June 16th, 2012 Jun 16, 2012 8:25:23 PM -   #27 (permalink)
dd2
T-Shirt Lover
T-Shirt Aficionado

dd2's Avatar
 
You can call me: Don
Member Since: Sep 2010
Posts: 171
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 2
Thanked 14 Times in 14 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by Yasirm86
It would be 9 minutes?? How did you get 9 I thought it would be 8 if I have 8 blocks
I am basing it on if your starting with the first section being exposed, and then you move it 8 times, there would be 9 sections total exposed. No matter, your going to be within 7 - 9 minutes total depending on your number of sections.... Once you figure out your optimum exposure- life will get easier and allow you to move on to other challenges. Just keep in mind that there are many factors involved with exposing (ie. type of light/ emulsion/ films). let me know if I can be of any help.
 
Old June 16th, 2012 Jun 16, 2012 8:47:22 PM -   #28 (permalink)
T-Shirt Lover
T-Shirt Aficionado

Yasirm86's Avatar
 
You can call me: Yasir
Member Since: Jan 2012
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 2 Times in 2 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by dd2
I am basing it on if your starting with the first section being exposed, and then you move it 8 times, there would be 9 sections total exposed. No matter, your going to be within 7 - 9 minutes total depending on your number of sections.... Once you figure out your optimum exposure- life will get easier and allow you to move on to other challenges. Just keep in mind that there are many factors involved with exposing (ie. type of light/ emulsion/ films). let me know if I can be of any help.
Got you! Okay well the first attempt didn't come out so I'm redoing it
 
Old June 16th, 2012 Jun 16, 2012 9:42:35 PM -   #29 (permalink)
T-Shirt Lover
T-Shirt Aficionado

Yasirm86's Avatar
 
You can call me: Yasir
Member Since: Jan 2012
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Thanks: 0
Thanked 2 Times in 2 Posts


Default Re: Calculating Exposure Time

Quote:
Originally Posted by dd2
I am basing it on if your starting with the first section being exposed, and then you move it 8 times, there would be 9 sections total exposed. No matter, your going to be within 7 - 9 minutes total depending on your number of sections.... Once you figure out your optimum exposure- life will get easier and allow you to move on to other challenges. Just keep in mind that there are many factors involved with exposing (ie. type of light/ emulsion/ films). let me know if I can be of any help.
no luck this is what i got...
Attached Images
File Type: jpg sdsd.jpg (586.0 KB, 161 views)
File Type: jpg dfazczcx.jpg (533.3 KB, 139 views)
 






This is a discussion about Calculating Exposure Time that was posted in the T-Shirt Articles 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


Article Tools

Posting Rules
You may post new articles
You may post comments

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
Article Article Starter Category Comments Last Post
Exposure time MANNYMARISCAL Screen Printing 16 March 22nd, 2015 10:08 AM
exposure time CHIZUCK Screen Printing 6 October 27th, 2009 07:32 PM
Exposure screen time calculator + Autotype Exposure Calculator NeroInferno Screen Printing 6 June 20th, 2009 07:44 AM
Exposure time with QTX Kysmiley1 Screen Printing 2 September 7th, 2008 02:21 PM
Please help. Exposure time. bear22 Screen Printing 3 July 4th, 2008 11:59 AM


All times are GMT -8. The time now is 01:26 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.