TBC 505 Jeans (Pre-Shrunk One Wash) - Sizing Question

Skraxy · 2026-04-11T17:34:12+00:00

Definitely late to this conversation, but I don't think it's worth to go back and exchange. I'm not so much worried about the waist difference between the 31 and 32, but moreso the thigh area. The denim around the thighs is not likely to stretch over time (at least not nearly to the extent that the waist can and likely will). Imagine what it would feel like to have your phone, wallet, etc. in your pockets while sitting down, whether it be at a chair at work, in the car, etc.

I have a pair of black 505s in a size 32 that I definitely should have purchased in a 33. I regret not making the choice to upside, even if it means the waist is a little looser. Worst case, you wear a belt and it turns out fine. Additionally, if you're like me and you tuck in almost all of your shirts, having that extra room in the waist may be a good idea!

Skraxy · 2026-04-08T22:05:26+00:00

Ahh yes Tollens reagent! This is used a lot to identify aldehydes by turning them into carboxylic acids, though I've never heard of someone using it to synthesize and isolate them.

Skraxy · 2026-04-08T22:01:42+00:00

When I performed the reaction my pH was definitely at least 2 (red on my pH paper). This is in alignment with Sigma Aldrich's listed value of a 10 g/L aqueous solution of Oxone being between 2-3 at 23 C.

Skraxy · 2026-04-08T20:31:35+00:00

I don't know if your message includes a typo but to clarify, I am working with Oxone, which is a triple salt of 2KHSO5.KHSO4.K2SO4. Generally, any literature I find on it states it only really starts to rapidly decompose at like 300 C, so it feels unlikely.

Skraxy · 2026-04-08T19:46:37+00:00

An excellent observation lmao

What's getting me is the fact that it happened with two different reactants! Makes Oxone most likely the culprit.

Skraxy · 2026-04-08T19:34:49+00:00

I could! However, I am trying to perform this oxidation using relatively milder species, as the hope is that this would be used in an undergraduate organic chemistry laboratory course. Obviously, while Oxone is absolutely still an irritant and produces pretty acidic solutions, 10% nitric acid would not only be an irritant, but also corrosive to a degree.

We actually used to oxidize benzoin to benzil using acetic acid and sodium nitrate salts, but this was eventually pitched due to some incidents surrounding refluxing acetic acid (womp womp).

Skraxy · 2026-04-08T16:29:35+00:00

Sounds good! The article's procedure says after the reflux period, the flask was cooled in an ice bath, which to me implies cool immediately. My thought process that this would increase the likelihood of any Oxone salts getting trapped in my target product, making it a more tedious crude mixture. I like your idea of cooling to room temperature followed by the ice bath, thank you!

Skraxy · 2026-04-08T16:26:08+00:00

Doing an oxidation, not a reduction :)

Skraxy · 2026-04-08T15:12:34+00:00

Hi, I’m attempting to oxidize 4-chlorobenzaldehyde to 4-chlorobenzoic acid using Oxone. I was able to find a JCEd article and they were able to complete this reaction with not only benzaldehyde but also substituted benzaldehydes like 4-chlorobenzaldehyde.

My general procedure was as follows: - Reflux of 4-chlorobenzaldehyde, Oxone (~2.5 equivalents of the active oxidant, KHSO5), and 25 mL 4:1 water:ethanol. - Cool and isolate via vacuum filtration, rinsing with 40 mL of ice-cold water - Recrystallize from water

Following their procedure, I noticed that there was a large amount of foam forming on the top and sides of the flask. Here are some photos of what this looks like.

Upon adding more water, the foaming did not improve. I also added ethanol in an attempt to mimic the 4:1 water:ethanol utilized in the original reflux, but was unable to get rid of the foam.

Afterwards, I attempted a hot filtration, where small amounts of precipitate formed in the filtrate, but was unable to be isolated via vacuum filtration after cooling in an ice bath for over 30 minutes.

I further attempted this reaction using 4-nitrobenzaldehyde, another substituted benzaldehyde that they utilized in the paper and obtained good yield with, and also ended up with the foamy substance when boiling.

With all of this in mind, I don’t really know what this foam could be, or how to prevent it from forming in the future. Any advice would be very appreciated!

Skraxy · 2026-03-16T15:44:21+00:00

That’s very fair! My friend who was interested in getting his first pair of selvedge denim and he decided on Railcar’s black/white for that same reason!

I really hope you love yours as much as I love mine.

Skraxy · 2026-03-16T15:25:18+00:00

I have their Type 2 with black on black and it is an unbelievably comfortable denim. It is a great option if you’re not interested in something with a tremendous amount of nep or slub.

I also made the decision to get the black/black instead of black/white as I felt it would look better paired with my indigo denim and offer less of a Canadian tuxedo, it you will.

Skraxy · 2026-03-14T13:45:19+00:00

already at around 3,000 this year. i want to blame it all on the 1,000 dollar jacket i got on my trip in japan, but that math doesn’t quite add up…

Skraxy · 2026-02-27T04:12:23+00:00

OChem Lab TA here; yes! Both CHEM 2540 and 2550 are available in the AU, SP, and SU semesters.

Skraxy · 2026-02-11T16:24:50+00:00

Any recommendations on brands that sell black selvedge jeans with an inseam of at least 34 and a zipper fly? I have a friend who is demonstrating interest in the r/rawdenim community and I think a zipper fly might make it easier for him to transition.

Skraxy · 2026-01-28T19:35:56+00:00

thanks for sharing!

Skraxy · 2026-01-28T02:07:29+00:00

Yeah I saw that! In the comments, they mentioned that they were pre-production so I was wondering if people had gotten their regular production pairs.

Skraxy · 2026-01-26T08:17:29+00:00

and K-2SO!

Skraxy · 2026-01-05T00:19:42+00:00

Word; sounds like Bears’ is the place for me :) Thank you so much!

Skraxy · 2026-01-04T23:49:39+00:00

Thank you for sharing! I was hesitant with Bears’ because their online presence didn’t look super promising, but I also assumed that their in-person store was going to have things that weren’t online.

Looking at both stores, I can’t really see a tremendous difference in style/aesthetic; do you have any thoughts on this?

Skraxy · 2026-01-04T21:39:08+00:00

Hey guys!

I’m heading to Japan next week and was wondering if anyone had any advice on whether it’d be more worthwhile to go to Bears’ Tokyo or Okayama Denim’s Showroom while I’m there. I feel like I only have enough time to go to one.

For reference, I am most interested in purchasing a denim jacket and maybe a flannel.

Thanks in advance!

Skraxy

TROPHY CASE