diff --git a/backend/main.py b/backend/main.py
index 62badab..c7f56b3 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,5 +1,6 @@
 import asyncio
 import base64
+import datetime
 import json
 import logging
 import os
@@ -1494,6 +1495,29 @@ async def api_reset_usb():
         return {"succes": False, "message": str(e)}
 
 
+FICHIER_LOG_IMPRESSIONS = RACINE / "data" / "impressions.jsonl"
+
+
+def _log_impression(photo: str, copies: int, format_papier: str | None, succes: bool, detail: str):
+    entry = {
+        "ts": datetime.datetime.now().isoformat(),
+        "photo": photo,
+        "copies": copies,
+        "format": format_papier,
+        "succes": succes,
+        "detail": detail,
+    }
+    config = charger_config()
+    evt = config.get("evenement", {}).get("event_id", "")
+    if evt:
+        entry["event"] = evt
+    try:
+        with open(FICHIER_LOG_IMPRESSIONS, "a") as f:
+            f.write(json.dumps(entry) + "\n")
+    except Exception as e:
+        log.warning(f"Impossible d'ecrire le log impression : {e}")
+
+
 @app.post("/api/imprimer")
 async def api_imprimer(donnees: dict):
     if evenement_est_termine():
@@ -1511,12 +1535,16 @@ async def api_imprimer(donnees: dict):
         return JSONResponse({"erreur": "Photo introuvable"}, status_code=404)
     cadre_override = donnees.get("cadre")
     format_papier = donnees.get("format_papier") or None
+    log.info(f"IMPRESSION demandee: photo={nom} copies={copies} format={format_papier} cadre={cadre_override}")
     try:
         resultat = imprimer(chemin, copies=copies, cadre_override=cadre_override, format_papier=format_papier)
     except Exception as e:
         log.error(f"Erreur impression inattendue : {e}")
+        _log_impression(nom, copies, format_papier, False, str(e))
         return {"succes": False, "erreur": "erreur_impression", "message": f"Erreur interne : {e}"}
-    if resultat.get("succes"):
+    succes = resultat.get("succes", False)
+    _log_impression(nom, copies, format_papier, succes, resultat.get("job", ""))
+    if succes:
         distribuer_photo(chemin, imprimee=True, copies=copies, format_papier=format_papier)
     return resultat
 
diff --git a/backend/printer.py b/backend/printer.py
index 6a7b319..e3ec332 100644
--- a/backend/printer.py
+++ b/backend/printer.py
@@ -353,7 +353,7 @@ def imprimer(
                 }
 
             if copie < copies:
-                time.sleep(1)
+                time.sleep(3)
 
         log.info(f"Impression terminée : {copies} copie(s), jobs={jobs}")
         return {"succes": True, "job": ", ".join(jobs)}