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Dealing with existing prep work on a Hell Creek dinosaur bone


TriVeratops

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38 minutes ago, Alex S. said:

Thank you for sharing the poster that is very interesting. Keep up the good work I look forward to seeing your next update.

 

Thanks, I appreciate the encouragement!!

 

Have ordered oxalic acid. In the meantime, I’ll continue removing paint.

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Posted (edited)

I’ve been finding that denatured alcohol works just fine for the paint removal, so i’ve been using that instead of acetone. But there’s an adhesive here and there that resists denatured alcohol, I’m guessing it’s superglue. For this I’m using cotton balls soaked in acetone. I leave them on for like 30 seconds, scrape, repeat. It’s not getting rid of all of the adhesive, but just enough that the unnatural gloss disappears and the color of the bone shows through.

 

before

IMG_5979.thumb.jpeg.c7fcdbb82d024aac5a2ae66f211fafc9.jpeg

 

after

IMG_5982.thumb.jpeg.eaec5b9f19dad7568d44bad9b287c0ba.jpeg

 

The changes are subtle, but it’s starting to look less smeary. 

 

IMG_5983.thumb.jpeg.4b107eff0b4008bf7a52e1488f0a2c29.jpeg

 

Btw the butvar arrived the other day. It dissolved beautifully in denatured alcohol (I mixed it at a 5% ratio of butvar to alcohol) and I used it to consolidate the little chunk of distal blade. It drank the stuff right up and feels more substantial now.

 

IMG_5976.thumb.jpeg.0cd2b251fb823a301dad3040b7e30a4a.jpeg

Edited by TriVeratops
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  • 4 weeks later...
Posted (edited)

Summer things got in the way for a minute, but today I had some down time and got back into it! I finished removing paint from the distal end and started on the big piece. 

 

I’m finding that in addition to being painted over, several areas of natural fossil were covered up with thin layers of plaster to smooth out the restored areas. It’s so satisfying to pop that stuff off.

 

Few more before/after pics.

 

IMG_6126.thumb.jpeg.48aebb26a7770d7f572ca74c3a8e1d20.jpegIMG_6127.thumb.jpeg.2c0fef9ad82f8774635a1934997b9e1b.jpeg

 

IMG_6128.thumb.jpeg.f92a5b6e5d36fc48ca47173d96e54ebf.jpegIMG_6129.thumb.jpeg.70b5de93197f94ae58f9f524f62ee7d6.jpeg

 

I’m really looking forward to digging out all that plaster. One step at a time.

 

 

Edited by TriVeratops
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You are improving this fossil immensely! Keep up the good work.  Its going to look professionally restored when you are done!

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"There is no shortage of fossils. There is only a shortage of paleontologists to study them." - Larry Martin

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I’ve removed enough paint to be satisfied with it, so now I’ve moved on to the plaster. 

 

A weak solution of oxalic acid and baking soda in water was enough for me to carve out all the plaster in this little section in an hour and a half or so. The solution doesn’t seem to react with the fossil at all. I could try a stronger solution to speed it up, but I’ll probably just stick with this to play it safe.

 

Before

IMG_6167.thumb.jpeg.fb72ce35cbbae8fa6d41dcab6bfedae2.jpeg

 

Paint removed

IMG_6168.thumb.jpeg.d8cc12822b8d3133d7fcc82387f8f504.jpeg

 

Plaster looking kinda like queso fresco, yummy

IMG_6169.thumb.jpeg.a8dad69a46d562c6513caab30b847485.jpeg

 

All clean!

IMG_6170.thumb.jpeg.e3a575f930909af97c301a8e00088ee4.jpeg

 

 

Edited by TriVeratops
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On 7/10/2024 at 11:33 PM, TriVeratops said:

I’ve removed enough paint to be satisfied with it, so now I’ve moved on to the plaster. 

 

A weak solution of oxalic acid and baking soda in water was enough for me to carve out all the plaster in this little section in an hour and a half or so. The solution doesn’t seem to react with the fossil at all. I could try a stronger solution to speed it up, but I’ll probably just stick with this to play it safe.

 

Before

IMG_6167.thumb.jpeg.fb72ce35cbbae8fa6d41dcab6bfedae2.jpeg

 

Paint removed

IMG_6168.thumb.jpeg.d8cc12822b8d3133d7fcc82387f8f504.jpeg

 

Plaster looking kinda like queso fresco, yummy

IMG_6169.thumb.jpeg.a8dad69a46d562c6513caab30b847485.jpeg

 

All clean!

IMG_6170.thumb.jpeg.e3a575f930909af97c301a8e00088ee4.jpeg

 

 

Looking good!

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Cheers!

James

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Had some free time over the weekend and made good progress.

 

my very professional workspace lol

IMG_6185.thumb.jpeg.fb0ff1a1eb6d96d5033b2d5db83f5072.jpeg

 

looking toward the proximal end, where the most work awaits

IMG_6186.thumb.jpeg.923e68961ce9f57690678b5a3251aae7.jpeg

 

IMG_6187.thumb.jpeg.d8e91ab6e9218ee090afcf6145b5cd43.jpeg

 

So far I’m finding that most of the pieces are pretty well secured with superglue, but some of them don’t seem to have a lot of contact points where two pieces connect, risking future failure. Glad I’m doing this.

Edited by TriVeratops
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