Computer Softwear Barbara K. Lunde, a former aerospace engineer for NASA, has found a silver lining, literally, for those worried about close and frequent exposure to low-frequency electric fields. She is making slips, underpants, camisoles and T-shirts in a silver-coated nylon fabric that she believes may shield against possible harmful effects of video display terminals, televisions, microwaves and other high-tech equipment. She calls her garments "Silver Lining," and tests by the fabric manufacturer indicate they help screen electric fields around the wearer's body.

Now a fiber optics engineer at Northwestern Bell Telephone Co., Lunde works on a VDT and has three home computers that her son Thomas, 15, also uses. But she is particularly concerned about her daughter Karen, 21, who is of child-bearing age.

"Before, the only way to protect people from electric fields was to put them in little copper rooms, or a space capsule or something like that," she said. "Now you can just wear comfortable clothes and be protected from electric fields."

So far Lunde has been selling her items through the mail to those concerned mostly about ill effects from VDT use. She knows that manufacturers and government officials say low-frequency pulsed electromagnetic radiation has no proven adverse effects on people, but she counters: "Here's something to shield ourselves from it, if there are any side effects . . . but I don't know."

Formore information, write B.K. Lunde, 2209 SW Park Ave., Des Moines, Iowa 50321.

Sen. John Glenn and The Ties That Blind

Sen. John Glenn used to wear red ties all the time. That is, until he spoofed the cosmetic changes -- like powdering their foreheads and wearing red ties to attract the camera -- senators might make now that television cameras are focused on Senate sessions. Since then he's been partial to light blue and yellow stripes and conservative paisleys. "I'll start wearing red again, as Henry Kissinger used to say, after a decent interval. And after I get used to TV in the Senate."

Theatrically, A Turn to the Wright Lady Majory Wright, wife of the departing British ambassador, who has made a name for herself as an actress and a patron of the theater in this town, was on stage last Sunday as guest of honor at a party given by Lillie Lou Rietzke, a McLean socialite and arts patron. Wright wore a sheer, softly pleated dress of Liberty of London fabric in an arts and crafts movement design by William Morris, and a garden party hat.

Rietzke was a picture herself in a sheer white lawn dress with blue velvet bows, modeled after the dress in the Renoir painting "The Swing." The dress was made for her by Margaret Harris from a photograph of the painting. Rietzke had the photo in her bag during the party. Only after the party did Rietzke remember that she owned the perfect parasol to complete the look.sw sk

Posting This Fall's Sewing Classes On the first Sunday in September The Washington Post will again list sewing classes to be offered in the Washington area this fall. If you offer a class in sewing, pattern making, tailoring or a related subject, please send complete information, including dates, times, location and fees to Martha Dailey, Fashion Department, The Washington Post, 1150 15th St. NW, Washington D.C. 20071. Information must be received by Aug. 27.sw sk

Joan Mondale & The Sachs Magic Joan Mondale was almost teary as she toasted designer Gloria Sachs at lunch at Nora's last week. "You called me after the election when I felt I had lost everything, including my confidence. You said you still hoped I would come to New York for clothes. I still wanted to look terrific, even in private life, and you understood that."

Mondale was wearing a patterned sweater and linen skirt by Sachs. Sachs, who had come to lunch from a White House reception, was wearing, appropriately, a red wool jersey jacket, blue silk shirt with big white stars and white skirt. Sachs also attended an official dinner for Pakistani Prime Minister Mohammad Khan Junejo at the White House.

Also at the White House reception and very noticeable in a splashy print dress cut down to the waist in the back and worn with hot pink shoes, hose and handbag was actress Jane Seymour. Fergie's Wedding Dress: Getting a Bum Wrap? There's just as much secrecy -- and speculation -- about the wedding dress for Sarah Ferguson for her marriage to Prince Andrew this Wednesday as there was for the dress Diana, Princess of Wales, wore at her wedding, also on a Wednesday, five years ago.

But the Elizabeth and David Emanuel, who designed the gown for Diana, were a far better known quantity, admired for their wedding gowns, than Lindka Cierach, whom Ferguson has chosen as her wedding dress designer. Cierach has a small custom business catering largely to the very conservative Sloane Ranger set.

Cierach isn't releasing any information about the dress, but that hasn't stopped Britain's tabloids from giddy speculation about the design. The focus of interest is on how the gown will flatter, or camouflage, the red-haired "Fergie's" Size 14 proportions, and particularly her derrie re.

"She has decided to wear a huge bow on her famous bottom," heralded the News of the World as though they knew. The rival Mail on Sunday countered with the insight that the dress will be heavily beaded with a bustle at the back.

But Cierach, until this assignment virtually an unknown among those who care about such things, is unfazed by size. "I think Fergie is going to set a trend," Cierach said in a recent interview. "She isn't skinny, but then the majority of my clients andxl the majority of ordinary people aren't skinny either. Sarah is just a very attractive, natural girl."

Cierach was angered by English press reports that Ferguson's hip measurement might be 42 inches. "One's personal shape and measurement is one's own business and I think it's rather sad that people should want to know," said Cierach.xl sw sk

Survival of the Fittest: Rating the Suits Can you tell the quality of clothing, like cars and ketchup, by the brand label? Designers hope that putting their "brand" on various products will suggest a high-quality make and design.

And Consumer Reports magazine apparently thinks so, too. It's no surprise that in the August issue, the most expensive Oxxford Exmoor N2 suit ($710) and a Giorgio Armani Boutique model ($715) are rated at the top of the list, and the least expensive models from Blair Personal Choice ($70 plus) and McGregor The International Collection ($90) at the bottom.

The report rates 29 models of men's gray suits and 10 women's suits by fabric quality, wrinkle resistance, overall construction and overall appearance. The study team worked with faculty at the Fashion Institute of Technology in New York to learn about workmanship and manufacturing.

In fact, the information on "How to size up a suit" is the most valuable part of the article. Among the pointers: Make sure lapels roll softly and lie flat against the chest; the lining should be stitched down in key areas such as armhole and hem; shoulder padding should never be heavy or lumpy; if the jacket lifts when you raise your arms, it is too tight; watch for puckers and pinched seam lines -- you don't want them.

The magazine wisely dodged the subject of style, except to say the panel was inexpert staffers joined by one fashion expert. However, they make a good point about fit. "A good fit can compensate for slight shortcomings in fabric or construction. A poor fit, on the other hand, can make even the costliest suit look cheap and sloppy."