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Color Source for the First Argentinian Flags.

A Lorena Picone1, Rosana M Romano1, Carlos O Della Védova1

  • 1CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 N° 1465, 1900 La Plata, República Argentina.

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Summary
This summary is machine-generated.

Scientific analysis of the oldest Argentinian flag confirms it as the first flag, hoisted in 1812. This textile study used advanced spectroscopy to determine its original silk composition and European indigotin dye.

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Area of Science:

  • Textile analysis
  • Historical artifact authentication
  • Dye chemistry

Background:

  • A 200-year-old historical controversy surrounds the first Argentinian flag.
  • The flag of Macha is considered the oldest preserved Argentinian flag.

Purpose of the Study:

  • To settle the historical controversy regarding the first Argentinian flag.
  • To determine the original characteristics of the flag of Macha through scientific analysis.

Main Methods:

  • Chemical analysis of the original textile.
  • Spectroscopic techniques including UV-vis, UV-vis diffuse reflectance spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy-energy-dispersive X-ray spectroscopy, and resonance Raman.

Main Results:

  • The flag is made of silk with a white, blue, and white horizontal arrangement.
  • The blue color was derived from European indigotin (Isatis tinctoria).
  • The flag was not treated with tin.

Conclusions:

  • The findings support the hypothesis that this is the first Argentinian flag, hoisted on February 27, 1812.
  • The blue color was later adopted by Central American entities.
  • The flag's preservation is attributed to patriotic vigilance.