The 26 people who make Safeway's private-label ice cream said yesterday they will walk off their jobs Friday in sympathy with the chain's striking bakers.

Ernest G. Moore, a Safeway representative, said the chain would go to outside sources for ice cream if necessary to provide an adequate supply for customers. The result, then, would be about the same as with the bakery strike -- supplies would be adequate, but prices would be higher.

The Safeway private label ice cream now sells for 99 cents for a half-gallon of Scotch Buy; $1.19 for the Snow Star half-gallon and $1.69 to $1.89 for Lucerne. Without those housebrand ice creams, customers would have to choose other labels, such as Briggs, which costs $2.59 for a half-gallon.

The Safeway ice cream workers belong to the same union as the 450 bakers who walked off their jobs Saturday at the Safeway Bakery in Landover, the Giant-owned Heidi Bakery in Silver Spring, and the baking centers at about 60 Giant and Safeway supermarkets.

Local 118 of the Bakery, Confectionary & Tobacco Workers International Union of America called the strike when its contract with Giant and Safeway expired and negotiations for a new contract broke down

Neither Grand Union nor A&P stores are affected by the bread strike.

Officials of the bakers' union have not met with Safeway or Giant since Saturday's walkout. No meeting has been scheduled.

With the machinery at their company-owned bakeries quiet and the ovens cold, Giant and Safeway have had none of their private-label bread or bakery goods to sell to their supermarket customers. To take its place, the companies ordered extra loaves of bread from the Wonder Bread bakeries and other suppliers.

The result for shoppers has been plenty of bread -- but at sharply higher prices.

Private-label Safeway and Heidi breads, for example, normally sell for 34 cents a family-size loaf. The least expensive bread in the stores since the strike has been Wonder Bread, which cost 87 cents for a family-size loaf.

The reaction of customers to the continued absence of bargain breads ranged from lack of interest to frustration.

At the Old Georgetown Road Giant in Bethesda, Marsha L. Max, 51, said yesterday she had not even noticed the disappearance of the Heidi bread. "I never buy store brands," she said.

In downtown Washington, at the Shaw Giant at 8th and O streets Nw Martha Mae Kitt, a 33-year-old mother of four, said she missed the Heidi bargain. "When you got four little ones to feed, you really use a lot of bread," she said.