CineStill Film Cs41 Powder Developing Kit for C-41 Color Film

You can develop Black and white film that is c-41 compatible. However hp5+ is a traditional process film and therefore incompatible.

In dark chemistry bottles, such as the ones listed below; https://www.bhphotovideo.com/c/search?Ntt=storage%20bottles&N=0&InitialSearch=yes&sts=ma

I store it in a thoroughly cleaned dark-green glass bottle (used to hold olive oil) and find it lasts much longer in dark glass than in the accordion plastic. Accounting for reusage as the manual instructs (add 0.02 * originall dev time for each roll processed) and adding my own instruction of 0.02 * original dev time for each month since you made the solution allows me to either use the chemicals for the 24 rolls it suggests or use it for say, 12 rolls over 12 months, as it will degrade over time. The blix solution lasts until the silver from the film has begun to noticeably precipitate—if you are really good at straining this out you may be able to keep using it (the blix solution itself is resilient to time degradation), but the precipitates can leave marks on the film.

It does not have a stabilizer but if you are shooting modern color negative film, a "stabilizer bath" is not necessary. Up until the mid 90's, the final rinse bath in the C-41 process was called a "stabilizer bath," since it contained Formaldehyde or Formalin. Modern color film emulsions include chemical stabilizers within the film emulsion itself.

They should be fine, powder is much more resilient than liquid.

Unfortunately when buying online it is not possible to know the expiration date before receiving the product.

You could take an E6 film and cross process it with this C41 kit. The issue is that cross processing is all about trial and error and be open to see what happens. We cannot guarantee what results you will have, but it is a fun process to use. If you are open to wild and unpredictable results and are interested in DIY it would be something fun to try.

Due to the warning labels (health hazard and exclamation label), it might be classified as hazardous materials by the FAA/TSA and are likely not permitted as carry-on OR check-in items. Please contact the FAA, your carrier, and this website for more information or to get approval before your flight. https://www.faa.gov/hazmat/packsafe/