The April 3, 1942 edition of the Honolulu Star-Bulletin ran an article about “A New Easter Bunny,” but the bunny wasn’t a lovable rabbit, it was a gas mask. The article read, “The Easter season in Hawaii coincides with the manufacture of ‘bunny masks’ designed to provide gas protection for infants.” The hoods were made in Hawaii by volunteers working in cooperation with the Office of Civilian Defense (OCD) Department of Chemical Warfare. The civilian command center for the gas mask distribution was at OCD Headquarters at Kaahumanu school. Mothers were instructed to direct any questions about gas masks there. The telephone number was 6473.
The first photo shows Mrs. James R. Tiernan of the Office of Civilian Defense Press Division modeling the hood on a doll. The mask was the design of Colonel Unmacht, a chemical officer in the army.
The War Department in Washington, DC was aware of the possibility of a chemical attack by the Japanese. To protect civilians from chemical warfare, they immediately shipped military training gas masks to be used by the adult civilian population of Hawaii. (These masks were “APRs”—air-purifying respirators that strapped over the head of the adult.)
They were fine for adults, but were useless for children and infants, not only because of their size, but also “because the infants and children lacked the respiratory strength to compensate for the filter’s restrained intake ability.” Simply put, children and infants weren’t strong enough to be able to suck in air and override the respirator’s resistance; they would suffocate.
On December 18, 1941, Colonel Unmacht sent a request to the War Department for children and infant masks, but none existed. So, Unmacht’s staff along with the Hawaiian Surgeons Office got together to create one for island children. They knew they wanted “a box respirator with a protective hood.” And Unmacht thought if the hoods were designed to appeal to children, they would be more readily worn. It was Unmacht who came up with the idea to add “ears” to the hood. He thought the “wiggling ears put a sense of play into the protective hood.” (No, Colonel Unmacht did not have children. In fact, he was not married until later during the war.)
The final design of the “Bunny Mask” was a double bag with an eye window and a drawstring to fasten it tightly around the child. The outer bag was made of “felt or denim impregnated with CC-2 (chloramide powder) in paraffin. The inner bag was muslin that was also impregnated with paraffin. The eyepiece was scrap celluloid from old x-ray negatives. Inside the hood was a small breathing pad made of a double layer of heavy Turkish terry cloth that was dampened with a 5 percent sodium phenolate solution prior to use. All seams were double stitched.” (Directions for Use of Bunny Masks, U.S. Army, published May 14, 1942)
Let’s break that down. The CC-2 is a chemical which counters the effect of mustard gas. It’s still used in military gas protection gear. The sodium phenolate, is considered a strong irritant to skin and eyes. The Office of Safety Health Administration currently posts this warning about the chemical: “Poisoning, due to ingestion or transdermal absorption, causes symptoms including colic, local irritation, corrosion, seizures, cardiac arrhythmias, shock and respiratory attack.”
Most of those negative reactions were known by the medical community at the time, but it was a risk/benefit decision. It was either death by poison gas, or exposure to sodium phenolate.
When the women went to pick up the Bunny Masks they were required to bring their identification card and an empty two, three or four ounce bottle with a screw top. The chemical sodium phenolate was poured into the bottle; then the mother was given a demonstration on how to pour it, “Just dampen the terry cloth, but not too much.”
Two women I interviewed remember the bunny mask and the directions. One of them was a nurse, who said she knew the risks of using such a phenol and even with her training, she wasn’t confident about using it. The other told me she would never use it. “I know I’d pour too much of the stuff on the towel and kill my son. I’m glad we never had a gas attack from the Japanese.”
The bunny mask was designed to grow with the child. As an infant, the entire child was placed in the hood as you can see in the photo of Flores Chrysollsus. (In the photo Flores is sitting on his mother’s lap. Look closely and you’ll see she has tied the mask firmly around his middle as directed. Her mask is on the table in front of her.) For a toddler, the mask was tied at the waist and for an older child, it was tied at the neck. In the next photo, Colonel Unmacht, is preparing to fit a mask on Theodore Akau at Pohukaina School. At the left are Mrs. Elizabeth I, Jr, and Barbara Jean Akau, and at the right Mrs. Doris Akau and Ediith Mau. 
Construction of the bunny masks was a volunteer effort. Mrs. Caroline Edwards of the Home Economics Division of the Department of Instruction was in charge of the project. She trained and certified women to sew the masks. The directions had to be followed exactly; the seams had to be strong. No gaps were allowed.
One bunny mask required one and a half yards of 36-inch wide muslin, one and a half yards of 36-inch felt or denim, one Turkish towel, 5 inches by 12 inches to be used as the breathing pad, one eyepiece window made from a piece of 4.5 inches by 8.5 inches of cellulose acetate, three draw straps, one three-ounce bottle and the three ounces of sodium phenolate. (Honolulu Advertiser, May 26, 1942).
Despite weekly calls for volunteers in the newspaper, the numbers of women who joined the “Bunny Mask Corps” fell short. (Honolulu Advertiser, June 3, 1942) Women of the Honolulu Art Academy, Red Cross and Roosevelt High students made masks, but it was the women of the Japanese community who stepped up to make them on target meeting quotas and deadlines.
Next column: Bunny Mask, Part 2