Laser Etching - Lines Per Inch DPI 🤯

#Lines per inch
#Thunder laser
#Co2 Laser
Lines per inch (LPI) is a measurement of printing resolution. A line consists of halftones that is built up by physical ink dots made by the printer device to create different tones. Specifically LPI is a measure of how close together the lines in a halftone grid are. The quality of printer device or screen determines how high the LPI will be. High LPI indicates greater detail and sharpness.[1]
Printed magazines and newspapers often use a halftone system. Typical newsprint paper is not very dense, and has relatively high dot gain or color bleeding, so newsprint is usually around 85 LPI. Higher-quality paper, such as that used in commercial magazines, has less dot gain, and can range up to 300 LPI with quality glossy (coated) paper.
In order to effectively utilize the entire range of available LPI in a halftone system, an image selected for printing generally must have 1.5 to 2 times as many samples per inch (SPI). For instance, if the target output device is capable of printing at 100 LPI, an optimal range for a source image would be 150 to 200 SPI. Using fewer SPI than this would not make full use of the printer's available LPI; using more SPI than this would exceed the capability of the printer, and quality would be effectively lost.

[@hcdittmer1]

Nicely done empirical test. Thank you.

[@Michelle-vg5lc]

Very useful info you deserve more views. Thanks.

[@carphotography]

Thanks, As long as i can help a few people out i be happy (Y)

[@donm1025]

Very interesting...I am new to lasers and have an Ikier coming this week...want to do a similar test

[@David-ws6zr]

Im learning so much from your videos, im going to be honest i bought the plug in for gimp, but could not get the photos to come out right, came across your video and tried imagr and worked first time ,so now im trying to dial my machine in and your video's are spot and a varied spectrum ,so i have to say a big thankyou for taking the time to make and share your video's

[@carphotography]

awesome thanks for watching and glad i can help some people out with my videos, if you do get stuck on anything else or have a problem or question and if i can help i will. thank you

[@carphotography]

also with the plug in or anytime you dither outside of lightburn make sure when you go to lightburn that you use PASSTHROUGH as the image mode and it will work, i like 260 DPI

[@rightpassage]

Wow that was great! Good idea just to cut it out and have a reference mine goes up to 4,000, I can only imagine? I'm thinking 300 is The Sweet spot research says between 300 and 600? When I get my Mira 9 or Nova I will have to run a test! 🤔

[@carphotography]

yes the only one down side is for every line per inch you add you are adding time to the job, just have to find the sweet spot, for me for images it is about 260dpi and for acrylic i like 300 and very low power.

[@obadiahmcgee811]

So what is a good number to keep your lines per inch? Are should it be adjusted depending on your project

[@carphotography]

with my laser there is no need to go any higher than 225dpi for Acrylic as the lines are already touching eachother and covering all the material.

[@sherlockhomeboy4031]

Why is it so white. I've seen thin lenticular laser lines that aren't so jagged. Is this fiber or c02?

[@carphotography]

it is a CO2 laser you cant see the lines like that with your naked eye and id just a very minor offset adjustment it does a really nice job, the smooth white is just a matter of having the right settings and airflow