Search found 81 matches

by Mpitt
Fri Jul 20, 2018 4:34 pm
Forum: MRE Reviews
Topic: 2001 Beef with Mushrooms MRE Review
Replies: 1
Views: 92

Re: 2001 Beef with Mushrooms MRE Review

Nice review. I agree with your jam assessment. I hope they bring Blackberry back into the current lineup. The cookies pack almost looked like it was vacuum packed. And, of course I like the clever link to the 'roached out coffee' post at the end. ;-)
by Mpitt
Wed Jul 18, 2018 9:26 am
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

thanks everyone I appreciate the comments and I'm very happy you enjoyed seeing the results. I do want to reiterate that this does not prove that this coffee is safe to drink. It only proves that if you DO get sick, it won't be because of mold poisoning from the white residue.
by Mpitt
Tue Jul 17, 2018 8:03 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

I have to say it, you have finally cracked the mistery of the white stuff on the tasters choice! Now the only part of the mistery that remains is why it happens and why the tasters choice only... Added extra caffeine maybe? :? Thanks Carlosflar, it was fun to do. Of course, like any good scientist,...
by Mpitt
Tue Jul 17, 2018 7:13 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

TL;DR - The white fibrous residue even though having the appearance of mold, was identified and verified to be caffeine crystals. Does that mean that these old and nasty looking instant coffees are safe to consume? Maybe, but I doubt it. I sure am not going to try one. There is clear evidence of lon...
by Mpitt
Tue Jul 17, 2018 7:12 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

Also, collection of white material was isolated from a coffee grain using a tungsten probe and transferred to a salt disk for micro-FTIR analysis. The resulting FTIR spectrum was consistent with pure Caffeine. Caffeine_structure.svg.png sample 4 spectrum.jpg Caffeine Spectrum.jpg Spectral Overlay.jpg
by Mpitt
Tue Jul 17, 2018 7:10 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

A sample of the white material was isolated by hand for SEM analysis. The fibers were very non-conductive as can be seen with the excess amount of charging build-up in the images. Even though image quality was poor due to the charging, the caffeine crystal morphology (fibrous and somewhat dendritic ...
by Mpitt
Tue Jul 17, 2018 7:08 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

To perform further analysis, the white fibers had to be isolated from the coffee grains. It was anticipated that the coffee should be very soluble in water and if the white residue was mold-based (fungal hyphae), it should be very insoluble. A single coffee grain of the white residue sample was mani...
by Mpitt
Tue Jul 17, 2018 6:50 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Re: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

The first red sachet was opened and visually, no white residue was apparent as seen in the first image below. Upon inspection under the stereomicroscope, some fine white fibers were present on the coffee grain surfaces. This was likely the white material in question but there would not be enough of ...
by Mpitt
Tue Jul 17, 2018 6:43 pm
Forum: MREs
Topic: Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation
Replies: 22
Views: 343

Coffee Instant, Taster's Choice, Red Sachet White Fibrous Residue Investigation

I have completed the investigation analysis of the white residue material associated with the aged red sachet Tasters Choice Instant Coffee which was made possible by the generous donation of a handful of samples from the collection of MREInfo member, SentientTootsieRoll. The primary purpose of the ...
by Mpitt
Sun Jul 15, 2018 3:23 pm
Forum: MRE Reviews
Topic: 2002 Beef Enchiladas MRE Review
Replies: 6
Views: 255

Re: 2002 Beef Enchiladas MRE Review

The ones I gave you were mostly from 2004 era MCWs. There's a small possibility one of them came from an MRE from that same year or from the mid-late 90s. If you're interested, I can collect as many red Taster's Choice packets and send them to you for further analyzation. I have no use for them. Ju...