I am sorry for late reply , He is called Photo Engineer and you can send a pm with writing only these words to the adress at private message.
Click on notifications at top right side of the pages and you would see at left New Message button. When filling the adress , robot would help you to find the correct address. You will see.
May be I am wrong but his name is Ron Mowrey and he published a book and dvd on emulsion making. He is coauthor of Kodachrome patent.
NASA site - pictures- is not responding , search at mission pictures as14 nasa at google.
Have fun ,