Author Topic: Freebie Halftone min - max test  (Read 5502 times)

Offline Dottonedan

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Freebie Halftone min - max test
« on: October 22, 2020, 02:26:46 PM »
Hello All,

I’ve uploaded a halftone test file. You can burn with your choice of lpi and determine where you are with the minimum dot you can hold and the maximum shadow dot before filling in. Please post up your best results. We can then see how you might improve. Also (if you have any ability to blow up on the dots, in the smallest section that would be much appreciated. We would especially love to see the edge walls of exposure in the stencil if you happen to have a digital magnifying loop.


https://drive.google.com/.../1xRf8mZNrrqsshLEGi6P.../view...
« Last Edit: October 28, 2020, 03:38:07 PM by Dottonedan »
Artist & high end separator, Owner of The Vinyl Hub, Owner of Dot-Tone-Designs, Past M&R Digital tech installer for I-Image machines. Over 35 yrs in the apparel industry. e-mail art@designsbydottone.com


Offline blue moon

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Re: Freebie Halftone min - max test
« Reply #1 on: October 22, 2020, 02:31:29 PM »
Hello All,

I’ve uploaded a halftone test file. You can burn the with your choice of lpi and determine where you are with the minimum dot you can hold and the maximum shadow dot before filling in. Please post up your best results. We can then see how you might improve. Also (if you have any ability to blow up on the dots, in the smallest section that would be much appreciated. We would especially love to see the edge walls of exposure in the stencil if you happen to have a digital magnifying loop.

https://drive.google.com/file/d/1Lfk0wHR50HfLjzEyGMA_OCz_JbMWYWMi/view?usp=sharing

it has been my experience that the 100% section needs to be a little longer so the solid area is obvious. Otherwise it is hard to tell where the 100% starts. To make it more effective and easier to use, add a 100% block to the right of the scale and place a line indicating where it starts.

pierre
Yes, we've won our share of awards, and yes, I've tested stuff and read the scientific papers, but ultimately take everything I say with more than just a grain of salt! So if you are looking for trouble, just do as I say or even better, do something I said years ago!

Offline Dottonedan

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Re: Freebie Halftone min - max test
« Reply #2 on: October 24, 2020, 12:02:51 PM »
You're right. I overlooked that. Minor thing, but it does help.
Artist & high end separator, Owner of The Vinyl Hub, Owner of Dot-Tone-Designs, Past M&R Digital tech installer for I-Image machines. Over 35 yrs in the apparel industry. e-mail art@designsbydottone.com

Offline BRGtshirts

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Re: Freebie Halftone min - max test
« Reply #3 on: October 27, 2020, 04:15:18 PM »
Dan, thanks so much for creating. Our shop just switched to 100% Shurloc screens and I was already in R&D, so this is perfect. Quick question, we're using all thin thread/s-mesh so I'm thinking a 225/40 thin thread I'd burn on 55 lpi correct?  You mention 280 but thinking I could get away with it.

Offline Dottonedan

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Re: Freebie Halftone min - max test
« Reply #4 on: October 27, 2020, 06:29:26 PM »
Yes, you can, but due to the math, you force losing your smaller dots anyways. For me, the intent for these test are to know what mesh you CAN use when you need to for those very small dots.


There is a general rule of thumb to deiced your mesh by one of these numbers.


4, 4.5 or 5.


When I need to be sure I’m holding small 2-3% dots, I’m usually using 5.


225 divided by 5 give you a 45lpi.  BUT, that not to say you can’t use a 50 or 55lpi. Just know that the higher LPI you go on that mesh, the more you increase your chances for NOT holding this small dots.


A lot of people use 4. If you take 225 and divide by 4, you get 56.25 (rounded to 55lpi), but these people aren’t holding very small dots.  If the art does not contain dots below say 10% then you’re golden.  If any part of the art fades off to the shirt or blends out to 0%...don’t use 4.
Artist & high end separator, Owner of The Vinyl Hub, Owner of Dot-Tone-Designs, Past M&R Digital tech installer for I-Image machines. Over 35 yrs in the apparel industry. e-mail art@designsbydottone.com

Offline TheGhost

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Re: Freebie Halftone min - max test
« Reply #5 on: October 28, 2020, 12:25:34 PM »
Great info as always! Hey care to share the file again? I can't get it cuz it says it is in your trash. Thank you.

Offline Dottonedan

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Re: Freebie Halftone min - max test
« Reply #6 on: October 28, 2020, 03:37:38 PM »
https://drive.google.com/.../1xRf8mZNrrqsshLEGi6P.../view...


This should be the updated one. There was an error on box 92% being only 91%.
Artist & high end separator, Owner of The Vinyl Hub, Owner of Dot-Tone-Designs, Past M&R Digital tech installer for I-Image machines. Over 35 yrs in the apparel industry. e-mail art@designsbydottone.com