I'm sandblasting 30 clear heart redwood signs, client supplied sign blanks are 1" thick and vary in size from 18"x18" - 36"x60".
Client supplied rubber mask is pre-cut / weeded, 1/16" thick, depth of blasting to be 1/4" deep.
Sandblasting with rental equipment, 130 CFM unit w/ a tow behind diesel commpressor.
Copy area of blanks have been spray coated twice with laquer sanding sealer then sanded smooth.
Client spec's oil base stain background, oil base copy color.
Reading the information on this site I gather it's not good to pre-paint the letter color before masking and blasting.
What, if any, problems I may incounter could you bring to my attention.
My background is printed in the March 1999 issue of the Sign Business magizine, pages 56-62. If you have any questions about urethane foam sculpted, fiberglass signs, feel free to ask. Largest FRP sign was 1,230 sq.ft.
Thank you. Len
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This is an interactive Bulletin Board on the topics of Sign making, design, fabrication, History, old Books and of coarse Letterheads, Keepers of the craft. The Hand Lettering Forum features links to resources, sign art history, techniques, and artists profiles. Learn more about Letterheads at https://theletterheads.com. Below you'll see Mchat has been added as a live communication portal for trial, and the Main forum Links are listed below.
Redwood sandblasted signs
Moderators: Ron Percell, Mike Jackson, Danny Baronian
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Danny Baronian
- Site Admin
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- Joined: Wed Apr 07, 2004 2:16 am
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Len, you ask: "What, if any problems I may incounter could you bring to my attention."
Problems with what? With the blanks they supply, with the precut mask, with the painting method you plan on using ? Are you certain of the quality of the products they supply? Are the blanks kd / vg / ch? How old are the masks? If supplied materials fail, who provides replacements, covers lost labor, and forgives missed deadlines?
By the sound of the scope of projects you've completed, you have the experience to answer these questions. The only suggestion I'd make is to get a blank and mask from them, blast it and paint it. This work is straight forward, but not one I'd do for the first time in any quantity, unless I did a sample first. A sample is cheap insurance, a possible sample, and knowledge gained - first hand.
With all the information Mike, Raymond and Jay have posted under My Finish First Sandblasted Sign minus peel up!, the answers are all there -tried, true methods that have stood the test of time.
I hope this helps,
Danny
Problems with what? With the blanks they supply, with the precut mask, with the painting method you plan on using ? Are you certain of the quality of the products they supply? Are the blanks kd / vg / ch? How old are the masks? If supplied materials fail, who provides replacements, covers lost labor, and forgives missed deadlines?
By the sound of the scope of projects you've completed, you have the experience to answer these questions. The only suggestion I'd make is to get a blank and mask from them, blast it and paint it. This work is straight forward, but not one I'd do for the first time in any quantity, unless I did a sample first. A sample is cheap insurance, a possible sample, and knowledge gained - first hand.
With all the information Mike, Raymond and Jay have posted under My Finish First Sandblasted Sign minus peel up!, the answers are all there -tried, true methods that have stood the test of time.
I hope this helps,
Danny
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joe crumley
- Posts: 26
- Joined: Sat Aug 28, 2004 12:23 pm
Lenny,
You would do well to review the post Danny mentioned.
There are a couple of suggestions, aside from doing a test panes: 1" vertical grain is too thin to do much of a blast on, which at the best will more than likely, curl up like a potato chip, and second you don't need anything like 140 PSI. It is the CFM you are looking for, which should be from 100 to 185 with a PSI 90. Even 80PSI may be better as the higher pressure only lifts sandblast make.
I hate to be negative on this, but I wouldn't take this job on for any price.
j
www.normansignco.com
You would do well to review the post Danny mentioned.
There are a couple of suggestions, aside from doing a test panes: 1" vertical grain is too thin to do much of a blast on, which at the best will more than likely, curl up like a potato chip, and second you don't need anything like 140 PSI. It is the CFM you are looking for, which should be from 100 to 185 with a PSI 90. Even 80PSI may be better as the higher pressure only lifts sandblast make.
I hate to be negative on this, but I wouldn't take this job on for any price.
j
www.normansignco.com
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Roderick Treece
- Posts: 1086
- Joined: Sat Apr 10, 2004 8:04 pm
- Location: San deigo Calif
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Denver Chapter of the Letterheads