![](/system/files/styles/slideshow/private/field_images/20th_masterclass_2021_poster_2_sessions_jpg.jpg?itok=hxhNzr4R)
Location
PortoDate and time
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20th Masterclass - Agar Spray: News applications of rigid gel, with the italian conservator Ambra Giordano. We will have two sessions (29th-30th November) or (2nd-3rd December). This Masterclass was postponed from last year, so we already have a couple of places.