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Third cholla bowl #2: Second pair of pours for the blank

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Blog entry by Dave Polaschek posted 05-07-2022 02:35 AM 842 reads 0 times favorited 11 comments Add to Favorites Watch
« Part 1: Building the blank Part 2 of Third cholla bowl series Part 3: Third batch of pours »

Nothing too exciting in this one, but I want to document what I’m doing for my own records, too.

I went back out this evening and wrapped the blue tape an inch and change higher, rotated the blank 180 degrees so I would be pouring epoxy into the end that had almost none in it, and mixed up another batch of epoxy. This time it had 30+ drops of Aqua and I added 5 drops of TransTint Bright Red. That made a reasonable violet, though I maybe had just a touch too much blue.

After pouring that, I added some more pieces of cholla, trying to get them going a different direction than the ones they were on top of, and once I had about half of the blank built up that extra layer, I mixed another batch of epoxy with just the Bright Red. I think I did 8 drops. Then I poured that over the other side of the blank, trying to avoid mixing the two still-liquid pours too much. I put on three our four more wraps of blue tape as insurance against leaks, and moved the blank to the floor, just in case. Ten ounces of liquid epoxy leaking over the bench would be quite a mess. It wouldn’t be pleasant on the floor either, but at least it won’t ruin many tools if it leaks now.

The pieces of cholla that don’t have any epoxy visible on the top of them will be where I concentrate the next couple colors / pours of epoxy. I think before I pour the next one, I’ll make a mark around the tape at a final thickness for the blank, and I’ll work on stacking cholla and pouring epoxy up to that level so I don’t get a wildly unbalanced blank. I think I’m going to aim for something between 2.5 and 3 inches thick.

-- Dave - Santa Fe



11 comments so far

View Eric's profile

Eric

4996 posts in 1328 days


#1 posted 05-07-2022 02:44 AM

I don’t blame you for setting that on the floor, it would be a real mess on the bench. What about using a large plastic tub to set in while it cures, just in case a leak springs.

-- Eric, building the dream

View Dave Polaschek's profile

Dave Polaschek

10263 posts in 2037 days


#2 posted 05-07-2022 02:48 AM

Then I would need a clean space big enough for the plastic tub on my bench, Eric. ;-)

I just set it on a piece of cardboard. So far the leaks I’ve had have been maybe the size of a silver dollar, and have stayed on the cardboard, but I’m always worried the tape will come loose or something and the whole mess will pour out.

If this one holds, I’ll have a solid, cured layer across the bottom inch or so, which generally means I’m pretty safe for the rest of the pours. The epoxy glues the tape together if there are any small leaks.

-- Dave - Santa Fe

View Eric's profile

Eric

4996 posts in 1328 days


#3 posted 05-07-2022 02:51 AM

That’s good, only the first pour to really worry about, that’s good.

-- Eric, building the dream

View pottz's profile

pottz

25713 posts in 2439 days


#4 posted 05-07-2022 03:03 AM

very interesting dave ill be following along.may not comment but ill be with you watching.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Dave Polaschek's profile

Dave Polaschek

10263 posts in 2037 days


#5 posted 05-07-2022 03:08 AM

Yeah, Eric. I usually only do the first pair on the first day, but I had some spare time this evening, so went ahead and did a second pair.

Thanks, Pottz. My guess is I’ll end up using about a full quart kit (1.5 quarts of mixed epoxy) for this blank, so it’s not a cheap experiment, but the results should be fairly good, based on what the folks who’ve seen my first two have said.

-- Dave - Santa Fe

View pottz's profile

pottz

25713 posts in 2439 days


#6 posted 05-07-2022 03:16 AM



Yeah, Eric. I usually only do the first pair on the first day, but I had some spare time this evening, so went ahead and did a second pair.

Thanks, Pottz. My guess is I’ll end up using about a full quart kit (1.5 quarts of mixed epoxy) for this blank, so it’s not a cheap experiment, but the results should be fairly good, based on what the folks who’ve seen my first two have said.

- Dave Polaschek


hey go for it the last one was pretty damn cool bud.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Oldtool's profile

Oldtool

3505 posts in 3645 days


#7 posted 05-07-2022 11:24 AM

Dave,
Interesting experiment & the results should be fantastic.
Regarding the concerns of leaks, I’ve found some of my favorite woodworking stores are the local Dollar Stores. You can find all types of disposable containers in all sorts of shapes. I use some for vinegar soaking of irons, smaller ones for mixing denatured alcohol & TransTint for dying projects, etc. Bet you can find something almost a glove fit for your project of the week.
I also use the dollar store for craft cardboard sheets to make full size drawings & patterns, large foam filled boards also for patterns. When I built a small phone stand for the wife, it had a bottom shelf that needed to fit perfectly between 4 legs so I used the foamboard, trimmed to fit by either cutting away or taping on pieces until it fit just right and bingo, the first wood cut piece fit perfectly.
Anyway, sorry to ramble, looking forward to the results of your current experiment, this stock orientation should yield very interesting appeal.

-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln

View Jim Jakosh's profile

Jim Jakosh

27696 posts in 4560 days


#8 posted 05-07-2022 11:55 AM

Hi Dave, I agree with Oldtool. The dollar stores have these thin plastic bowls that would be great for that. and you would never have to worry about leaks and save a ton of tape. I know what it is like to get a leak when right in the middle of a pour. It is like a 3 alarm fire. Along that line, you could buy a big and a small bowl and use the little one for a core in the center so you can save epoxy, too. I have used a big chunk of wood for that once and turned it all away.

Cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Dave Polaschek's profile

Dave Polaschek

10263 posts in 2037 days


#9 posted 05-07-2022 12:23 PM

Thanks, Pottz.

Thanks, Tom! We’re actually heading to the Dollar General near us this morning. Going to buy canned foods for the people who are evacuated from Las Vegas, NM and surrounding areas by the fires. We also stop there regularly for condiments for our local food pantry, which we help stock.

I currently use disposable containers for mixing epoxy. I have 1oz (30ml) medicine measuring cups and 5oz clear graduated cups that I use a lot. They’re both eBay specials, since I can almost always find a cheap price there pretty quickly (usually when I wake up in the middle of the night with an idea…).

Thanks, Jim! I’ll keep an eye out, but for now, the pine scraps from my bookcases are already paid for. But part of the reason I do pours of 150ml (5 oz) at a time is so any leak gets caught early. It means I’m spending more time mixing epoxy and waiting for it to cure, but it also lets me do different colors and tilt the blank for each pour so that I get the different colored layers stacked up in a (hopefully) interesting way.

I’ll definitely keep my eyes open when we’re at the dollar store today, but anything I pick up probably wont be used on this blank. I tend to turn them over after cutting them apart, so I’ve already poured the topmost layers of the bowl, and the pine backer board will be turned off the top of layers. But on the next one, I’m planning on setting up the cholla “stockade style” so if I can find a small bowl for the core, that may enable me to make one that isn’t constructed in layers.

Thanks, guys!

-- Dave - Santa Fe

View doubleDD's profile

doubleDD

11279 posts in 3498 days


#10 posted 05-07-2022 12:30 PM

Good to see you’re getting very few leaks or none at all. I’m finishing a box that had every kind of bug hole imaginable and used that blue tape to seal the holes for epoxy and had mixed feelings about it. Maybe a cheap brand?
Are you getting any bubbles from the cholla?

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View Dave Polaschek's profile

Dave Polaschek

10263 posts in 2037 days


#11 posted 05-07-2022 12:46 PM

Thanks, Dave!

I bought IPG ProMask blue tape, which has been very good to me.

Some bubbles from the cholla, but I tap the blank on the bench (or floor) a few times after each pour to try and dislodge as many as I can, and tipping it different ways as I pour gives epoxy a chance to find its way into more nooks and crannies.

I’ll have a few voids I’ll find when I cut things apart and turn the bowl. If they’re bad enough, I’ll stop, mix a 1oz batch of epoxy, let it start to set up, and use it as spackle to fill holes, then cover each with blue tape to hold it in place. That always feels like I’m a one-armed paper hanger.

I’ve also got some metal-filled machinable epoxy that I’ve used to fill voids. That’s super-thick and doesn’t run out much. And I’ve mixed “frosting” with cholla dust and epoxy, but haven’t gotten the proportions quite right yet. So yeah, more experimentation, which I’ll talk about more in a future blog.

-- Dave - Santa Fe

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