Artists signatures are always a problematic issue. While collectors and curators love hard and fast rules for the evolution of an artist's signature, in actuality, mosrt artist's signatures vary like ours do on a letter or check. There are times that they are more precise and careful and leave us a beautiful, stylized signature and times when they are sketching and sign their work with a barely legible scrawl or even a set of initals. In the case of Porfirio Salinas, most signatures are good and legible and over the course of his career he moved from a rather modest "Salinas" to "P. Salinas" or "Salinas" with a stylized "S" to a beautiful, stylized and memorable "Porfirio Salinas" with a flourish before and after the signature that is somewhat reminiscent of his mentor Robert Wood's signature during the last half of his long career. The signature styles overlap somewhat and artists will often sign sketches or minor works with a smaller signature that doesn't allow for the degree of care or stylization of a larger painting.
          The early work of Porfirio Salinas is usually modestly signed "Salinas," with the signature smaller in size than later examples. Now, this is not a hard and fast rule, as some works were signed with his full name.

      As Salinas came into his own he began to sign his work with greater confidence and some paintings of the 1930s possess a more stylized signature, as we see here. Works were also signed "P. Salinas," and he began to add a longer tail to the "P" and the "n" in Salinas.

      Porfirio Salinas rarely dated his works. Dating paintings was – and is – often discouraged by dealers, who don't want a painting to appear "stale" in their inventory. No matter how nice a painting is, collectors don't like the feeling that it may have been viewed and rejected by someone before them. This is the artist's beautiful, stylized signature.