Authenticating a Louis le Brocquy print takes three separate checks

The obvious answer is to look for a signature. That is only the first filter, and on its own it is the one most easily faked. The real verification runs through the edition record, the paper, and the dealer who handled it.

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The short answer

Start with the edition. A genuine Louis le Brocquy print is almost always a limited edition, numbered and signed, usually in pencil. Expect a number like 14/75, not a vague 'artist proof' without a count. The paper should feel like good archival stock, not thin poster paper. If the price looks like a poster and the seller cannot name the edition, walk away.

What the edition record actually tells you

A print is only as verifiable as its edition. Le Brocquy worked in limited editions for many of his graphic works, and the numbering is the first thing a serious buyer checks. A genuine edition carries a fraction, a signature, and usually a consistent count across the run. A seller who describes the same image as both an open print and a numbered edition is describing two different things and hoping you will not notice.

The catalogue raisonné for his prints is thin in the public domain, which is inconvenient but not disqualifying. What it means in practice is that you cannot always look up a print by title and year and get a clean yes or no. You have to work from the edition number, the paper, and the provenance instead. That is slower. It is also the only method that holds up when a signature alone would not.

The physical signs that separate a print from a reproduction

Hold the sheet at an angle to the light. A genuine intaglio or lithographic print usually shows plate tone, a slight ridge along the image area, or the kind of surface variation that a flat digital print does not. The paper itself matters more than most buyers expect. Le Brocquy prints were made on stock with some weight to it. Thin, glossy, uniformly bright paper is a warning sign, especially when the image looks too clean.

The signature is the part most often faked and the part least often decisive on its own. A pencil signature that sits too neatly on the surface, or that repeats the same pressure and slant across many different sheets, should make you slow down. Compare it with a known example if you can. If you cannot, treat the signature as one piece of evidence and not the whole case.

Red flags to check first

No edition number, or a number that does not match the stated size of the run
A signature that looks printed rather than hand drawn
Paper that is thin, glossy, or smells of recent inkjet output
A seller who cannot tell you the edition size or the year of the print
A price that sits far below the range for a numbered original print

Where to get a second opinion before you pay

If the print is expensive enough to matter, get a second opinion from someone who handles original prints regularly. A reputable print dealer, a specialist auction house, or a gallery with a real graphic work department is a better starting point than a general decorator or an online listing with no provenance. Ask for the edition size, the paper, and any record of previous ownership. A seller who answers those questions quickly is usually a better risk than one who answers them at all.

Authentication is a separate market from buying a reproduction. Auvrique sells reproduction editions, framed and on canvas, and does not authenticate or appraise original prints. That distinction matters because the two markets use different language and carry different risks. If your question is whether a sheet on the wall is an original le Brocquy print, you are asking about the original market, and the answer belongs there.

A signature is the easiest part to fake and the hardest part to trust on its own.

Check	What you want to see	What makes you pause
Edition number	A fraction such as 14/75, consistent with the stated run	No number, or a number that changes between listings
Signature	Hand drawn in pencil, with variation from sheet to sheet	Printed, too uniform, or missing entirely
Paper	Archival stock with some weight and surface texture	Thin, glossy, or bright in a way that reads as inkjet
Provenance	A seller who names the edition and can describe prior ownership	A seller who answers price first and provenance never

Key takeaways

A numbered, signed edition is the starting point, not the finish line.
Paper and surface tell you more than a signature alone ever will.
A seller who cannot name the edition size is a seller to treat cautiously.
Original print authentication and reproduction buying are different markets.

Related questions

Can a Louis le Brocquy print be authentic without a signature?

It is possible but unusual, and it raises the burden of proof on everything else. Some prints were issued unsigned or with the signature in the plate, but those cases are the exception rather than the rule. If a print lacks a signature, the edition record, paper, and provenance have to carry the whole argument. That is a harder case to make and a harder one to buy on sight.

What is the difference between an original print and a reproduction of one?

An original print is made directly from a plate, block, or stone in a limited edition, usually signed and numbered by the artist. A reproduction is a later photographic or digital copy of the image, often produced in larger numbers and without the edition structure of the original. The two can look similar on a wall. They are not the same thing in the market, and they are not priced the same.

Should I pay for a formal authentication before buying?

If the print is expensive and the seller cannot give you a clean provenance, yes, it is reasonable to ask for a second opinion before money changes hands. For a lower-priced print with a clear edition number and a credible seller, a formal authentication may be more than the print is worth. The right answer depends on the price and the risk, not on a rule that fits every case.

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