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A hallmark of the toolkit associated with the Clovis culture is the distinctively shaped, fluted stone spear point, known as the Clovis point.

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Centuries of practical experience in working with paint and inks often had more influence on the decisions printers made, especially since most theories did not yield expected results when applied in real life.

Once the field of advertising grew into an industry in its own right, marketing surveys would also proved influential in making color choices.

Even today, what most of us think we know about color is probably incorrect.

Why should postcard enthusiasts even care about the reasoning behind color choices in ink?

Many Christians have been led to distrust radiometric dating and are completely unaware of the great number of laboratory measurements that have shown these methods to be consistent.

Many are also unaware that Bible-believing Christians are among those actively involved in radiometric dating.

Almost certainly the century or portion of a century when it was built may be assigned with some certainty.

However, as more and more work is done and increasing numbers of structures with complex constructional phases are encountered, the general features may not be sufficient to give the accuracy in dating that is currently required.

Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.

There are over forty such techniques, each using a different radioactive element or a different way of measuring them.

The colors that found their way onto the surface of postcards might seem a simple matter of attempting to match them to reality or to express personal taste, but these decisions were largely made in relation to prevalent color theories of the day whether they were properly understood or not.

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