Не густо тут, но все же :)
http://ru.wikipedia.org/wiki/Нагрудный_значок

А есть история?Я не знаю...Типа откуда пощло ношение значков...Как нибудь более подробно)))ЗЫ:Сам искал - ничего(мягко скажем!)не нашёл

simpleass, не обращался к этой теме, сори чувак не могу помочь :)

Есть на английском именно о значках сделанных по закатной технологии.
Button History
Button History
Pin-back buttons made their first significant appearance in the late 19th century when cigarette and gum manufacturers began to include them in their packs for promotional value. The pins were manufactured with both open backs and closed backs. The open-back varieties included a paper advertisement insert that served to remind customers of the product.

Cigarette companies renewed this promotional initiative around 1910, commissioning several comic artists to fashion a series of celluloid pins. The pins were produced in color, black line on white background and white line on dark blue background.

Political campaigns made pin-back buttons popular in the late ‘20s and early ‘30s. Political pin-backs of this era have become highly valuable collectables for many button enthusiasts.

These days, pin-back buttons have made their way into a host of areas and activities. They’ve grown from their cigarette and gum pack beginnings to be of strong promotional value to a multitude of industries and organizations. From restaurants and banks to schools and non-profit institutions, pin-back buttons are used to advertise special promotions and sales as well as to create awareness and raise funds. They also continue to be beneficial in providing exposure for political candidates and campaigns and remain a time-honored tradition.

Self-starters have developed button making into great moneymaking businesses of their own, contracting with local companies, schools, churches and more to create custom designs for their events.

Crafting, businesses, education, fundraising and more – buttons have made their way into a multitude of places in modern-day life and their utility continues to grow with new and creative ideas being generated each and every day!

А если капнуть поглубже - то значки это просто одна из ветвей геральдических знаков и почитать об истоках можно здесь:
http://www.excurs.ru/history/Heraldry_history.htm