dr bob

The Pascha "pattern" is interesting enough when viewed straight-on. Rotating it 45º like that makes it even more so. I'm not sure I could leave it up on the screen for very long without needing to steady myself.

Jerry Feather

Here is what I think is my final pattern finished. If I don't need to send it somewhere to be duplicated for printing on some leather I think I'll sign it and frame it.

Hilton

I showed it to a colleague who's mathematically inclined - his comment was it looks like its a chequerboard pattern which is deformed, resulting in something like a sine wave as you traverse.

Shawn Stanford

You guys are dorks. Am I the only one who sees a stacked girl wearing a checked sweater?

Jerry Feather

And PG with her butt on backwards?

Jerry Feather

I am making a little more progress. First I looked into printing on leather and googled a place, but when I talked to them it turns out that they are a place to do vinyl heat transfers, mostly on cloth. They do have a vinyl suitable for transfer to leather, but they do not print custom patterns on it.

Then I went to my favorite sign guy here in River City and discussed it with him and he can obtain a vinyl suitable for printing and then heat transfer to leather, and can print it 19 inches wide. Perfect.

Next I consulted with my son the engineer about working the pattern up on a PDF file for the sign guy and he says he can do that fairly easily. I just need to give him the bandwidth numbers. He wants to do it straight up and down and then turn it 45 degrees for repeat.

Now I am hoping that he can draw it already at 45 degrees because I have new idea which derives from the name I find myself calling it - - "Diamond Pascha." When that occurred to me I then thought that the pattern can actually be made into more of a diamond pattern rather than based on squares. I think I'll try to have him work a pattern up using a 3, 4, 5 right triangle as the basis for the diamond and see what it looks like. I think he will have to do the pattern starting at 45 degrees, but I don't see why that can't be done.

The height of the new diamonds will still fit the 5.65 inch spacing and the width will put more of the pattern into the insert cushion sections of the 928 seats. I'm anxious to see what it looks like.

Back to the HTV: The sign guy can only print and cut the HTV, but I will have to figure out how to transfer it to leather. So, I googled that and find that it is fairly simple using an ordinary iron to heat and press it onto leather. Then I remembered that in a small estate I am handling where I have basically inherited all of the personal property, there is an old fashioned Mangle ironing device out in the garage that I was expecting to just throw away or put out in the street hoping someone would take it away. Now, I can see that devise working perfectly to iron the HTV onto lengths of cowhide cut to about 20 inch widths. Now I have to check it out to see if it even works.

dr bob

Jerry ---

Keep in mind through all the discussion with your son that once you have the image file as PDF, you can "print" it on your material at any scale you desire. So get the -relative- sizes of your rows and columns worked out for the visual effect you desire. Then print your transfer at a scale that makes your repeats line up on the pillows where you want them.

Have you considered simple screen printing? Once you decide on the exact size of one frame, you can screen multiples easily if you can put index points on your leather to keep the frames lined up and spaced well.

It's been a while since I last visited with Paul C at the OCIC event in Texas. IRRC he was telling us about some of the processes he'd been working on, including using a laser to put the pascha pattern onto the leather for his seats. Paul has dropped off the near-field radar lately, but perhaps he still has the equipment and ability to do that again on your leather. It may also be worthwhile reaching out to Rob Budd in Michigan to see if he has or knows of someone who has that capability. I think I'd have a lot more faith in that process vs. any HVT or painting that will undoubtedly rub off over time. These are seats after all.

GlenL

This would look great as part of a car wrap.

Let me add that I'm confused by the PDF. I think you want it in a graphics format and png is good for that. Or svg.

Jerry Feather

The pattern you show in the other thread is actually 22 by 22. It's in post number 29. It looks like there are way too many large squares of close to the same size to make it work; and there are only two narrow bands in the middle of the small ones.

dr bob

My local printer used to insist on EPS for projects I sent. The guys who were doing fabric work wanted Gerber files. At this point though, the printers are willing to work with PDF. Turns out they are pretty closely related to EPS, and their newer digital presses eat them natively. For something like this project where there are no halftones, darn near any vector graphics format will work.

The ultimate deciding factor is what your printing contractor wants. If you can produce that format directly, it's sometimes better than doing a format conversion later.

dr bob

I can make it any repeat or block size. In the other thread, my example uses a sine(radians) curve plus a fixed offset to describe the row and columns sizes. I can put in any formula that Excel will generate. The numbers in Excel are linked directly to the CAD program effectively as dimension parameters for those rows and columns. They are actually used to define dynamic block sizes and placement for each square.

The image I posted was sort of a proof-of-concept demo. Now that it's done, it's a matter of coming up with a formula or even just a list of the column and row dims to get the results we want. With more work I can add in some skew, so that you'd have the diamond shapes you mention when it's rotated 45º. If you have a 3D cad program you can probably move the viewpoint and eliminate perspective in your 90º boxes to get the same effect.

Recognize that I have no native artistic skills, think in black-and-white terms, and dink with the program and the geometry for casual amusement. No real expertise is claimed.

Jerry Feather

I don't claim to be an artist either, Doc, but I do find that a lot of what I do in design and fabrication relates to a lot of what artists also do.

I don't find the use of any kind of curves in my design process with this pattern at all and it is all based solely on straight lines. A curve or curves might be used to help decide on the block or panel spacing, but I just did that with a ruler and pencil getting it to progress evenly and still within the design dimension I need. I find that with an even progression the visual image takes on the near circular bosom-like appearance Shawn and I can see.

Jerry Feather

My printer requested that I provide the pattern in PDF, AE, or EPS, with EPS preferred.. My son can't do EPS and maybe not AE, but the printer says he can work with PDF. My son will be doing it in Solid Works, which is what he does all of his industrial design work in.

Dave928S

No Shawn .. you're not the only one

Study this closely Jerry, just to make sure you have the pattern right

928 GT R

Origins/evolution of Pascha go back to midevil times.