Further to Charles answer, I think you can refer to "galley proof(s)" for clarity:

http://dictionary.reverso.net/english-spanish/galley proof
galley proof' also found in translations in Spanish-English dictionary
prueba de galera
nf.
galley proof

prueba de imprenta
nf.
galley proof


http://www.dictionary.com/browse/galley-proof
noun, Printing.
1.
a proof, originally one set from type in a galley, taken before the material has been made up into pages and usually printed as a single column of type with wide margins for marking corrections.
Origin of galley proof Expand
1885-18901885-90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.

British Dictionary definitions for galley proof Expand
galley proof
noun
1.
a printer's proof, esp one taken on a long strip of paper from type in a galley, used to make corrections before the matter has been split into pages Often shortened to galley

http://www.businessdictionary.com/definition/galley-proof.ht...
Galley proof
Penultimate proof of a page being typeset for printing, before it is set (imposed) as a page of a book or booklet. Galley proofs are traditionally printed as a single column on a long strip of paper, and generally do not include illustrations. The next and final proof is usually the page proof. In the modern practice (where the text is set on a computer), galley proofs are dispensed with and instead a page proof are provided.