impregnation metallique Flashcards

1
Q

impregnation metallique utilise il un colorant

A

non

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2
Q

quel est le mtal le plus utilisé

A

argent

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3
Q

impregnation metallique sapplique surtout a quoi

A

reticuline
melanine
membrane basale

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4
Q

nomme les 2 methodes dimpregnation a largent

A

reaction argentaffine
reaction agryrophille

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5
Q

explique la reaction argentaffine

A

le tissu a la capacité de reduire largent

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6
Q

donne exemple de reaction argentaffine

A

melanine et champignons

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7
Q

donne exemples de reactions agrygrophile

A

reticuline, certains champignons, myeline, calcium

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8
Q

explique reaction agrygrophile

A

le tissu na pas la capacité de reduire suffisament largent il faut utilisé un agent reducteur externe

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9
Q

nomme les 7 etapes de limpregnation metallique

A

oxydation
sensibilisation
impregnation
reudction
virage
reduction
contrecoloration

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10
Q

nomme les 4 principaux agents oxydants

A

permanganate de potassium
metabisulfite de sodium
acide phosphomolybdique
acide periodique

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11
Q

nomme les 3 agents de sensibilisation

A

alun de fer
nitrate dargent
sulfate dammonium ferrique

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12
Q

il faut neutraliser la solution de nitrate dargent avec quoi avant de la jeter

A

du sel de table (NaCl)

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