The phrase "as a placard" is correct and usable in written English.
It can be used when referring to something that serves as a sign or notice, typically in a public space.
Example: "The information was displayed as a placard near the entrance of the building."
Alternatives: "in the form of a sign" or "as a signboard".
Bread and Roses is often as two-dimensional as a placard, or a billboard.
Beijing, Sochi, Baku, Qatar … why should nation states be allowed to allowed to use entire sporting events for obviously political purposes, but athletes cast from the firmament for raising so much as a placard?
When we arrived, we locked up our bikes by the cemetery fence and immediately noticed evidence of a drainage and construction project, as well as a placard directing us to Kerkstraat 7 across the street for more information.
About an hour later, I was walking outside Arthur Ashe Stadium when I saw a man holding a sign reading "Irina Falconi," which I recognized as a placard from the media interview rooms.
He comes off not as a person endowed with any psychological complexity but as a cardboard cutout of a hero, ready to be held up as a placard for a cause without any substance of his own beside the cause for which he stands.
Look for the sign identifying the collection as well as a placard with a listing of services that UChicagoGRAD provides.
They might as well wear a placard around their neck that reads "I will bore you to tears with my problems, drink your coffee, waste your time, and never ever ask how you are".
The genre shift wasn't a conscious decision ("I don't have compartmentalised genres; I like drama to have humour in it, and comedy to have heart"), just as taking a placard to the Bridget Jones premiere wasn't: it's just another way in which Solemani surprises herself as much as everyone else.
A demonstrator in Ankara chants slogans as he holds a placard that reads: 'No to war'.
"We're in a foreclosure plan – we can hardly keep our heads above water," she said as she wielded a placard in Bear Stearns's lobby.
As he quoted a placard that hangs on the wall of an aide's office ("Help Wanted — No Irish Need Apply"), he jabbed his finger in the air with such emphasis that he knocked my voice recorder to the ground and erased our conversation.
