One-week old shoot tip cultures, using 3% instead of 6% household bleach (v/v) as surface sterilant
Three of the cultures look pretty good.
Two have bacterial contamination, not sure if it's internal infection or just some bacteria that the surface sterilization simply missed.
Five-week old culture of shoot tips, using 6% household bleach (v/v) as surface sterilant
After 3 weeks in hormone-free medium, plus 2 weeks in multiplication medium, only the lower right explant shows definite growth.
Progress of 5-week old culture using intact shoot as explant
Before and after photos, after 2 weeks in multiplication medium.
Cloudiness in the "after" photo is condensation on test tube surface. The black patch on the leaf is 5-week old damage incurred during surface-sterilization of the explant with bleach.
Here's a clearer shot taken from a different angle.