Cubans donât haggle, and non-Spanish-speaking tourists get hit with the highest prices. The only cheap item in Cuba is the rum, where a bottle of Havana Club could go for as little as $3. President Obama last week announced that the US would re-establish relations with Cuba and ease other travel restrictions.
Range: -16 (darkest) to +30 (lightest) The Saybolt Color scale is used for grading light colored petroleum products including aviation fuels, kerosine, naphthas, white mineral oils, hydrocarbon solvents and petroleum waxes.
Fire Scale or Fire Stain is also oxidation but, it is below the surface of the metal. Sterling silver is very prone to firescale. Firescale/stain is a gray/blue/purple coloration that forms in the top layers of the metal. See the beginning of this article (updated 1/16/17) for the reasons that this happens.